Buying ASIC miners from China requires careful supplier verification, equipment testing, secure payment terms and clear shipping arrangements.
Purchasing cryptocurrency mining machines in China can be safe and cost-effective, but buyers must verify the supplier, confirm the machine’s condition and test its performance before making full payment. You should also clarify shipping, customs, warranty and after-sales responsibilities in writing.
Do not choose a supplier based only on the lowest quotation. An unusually cheap miner may be used, repaired, missing its power supply or no longer covered by the manufacturer’s warranty. The safest approach is to verify the company, record each machine’s serial number, arrange pre-shipment testing and use staged payments.
Verify the Chinese Mining Machine Supplier
Supplier verification should be completed before paying a deposit. A professional website, warehouse video or active social-media account does not prove that the seller is a legally registered and reliable business.
Ask the supplier to provide its:
- Full Chinese legal company name
- Unified Social Credit Code
- Business license
- Registered and operating addresses
- Company bank-account details
- Sales contract and invoice information
- Export and after-sales contacts
The company named on the business license, contract, invoice and receiving bank account should normally be consistent. If different companies are involved, the supplier should explain their relationship in writing.
Business License and Company Information
Search the supplier through China’s official National Enterprise Credit Information Publicity System using its exact Chinese legal name or Unified Social Credit Code.
Confirm that the business is active and that its legal representative, registered address and business scope match the documents supplied. Also check whether the company appears on abnormal-operation or serious-violation lists.
Business registration confirms that a company exists, but it does not guarantee product quality or successful delivery. Registry information should be combined with facility verification, customer references and equipment inspection.
Authorized Distributor and Supplier Background
Determine whether the supplier is a manufacturer, authorized distributor, independent reseller or broker. If it claims to be authorized, confirm this through the mining-machine manufacturer’s official website or support team.
Independent resellers are not automatically unreliable, but buyers should understand:
- Who owns the inventory
- Who issues the invoice
- Who handles the warranty
- Whether the machines are physically available
- Whether the supplier has completed similar exports
Search the company’s English and Chinese names together with terms such as “review,” “complaint” and “scam.” Speak with previous international customers when possible.
Office and Warehouse Verification
Request a live video call rather than relying only on prerecorded footage. Ask the salesperson to show the office, warehouse, available inventory and serial number of a selected miner during one continuous call.
For a large order, use a local representative or independent inspection company. An on-site inspector can confirm that the seller controls the inventory and that the machines match the contract before the final payment is released.
Buyers who need product availability or procurement support can also contact the JSBIT sales team.
Confirm the Mining Machine Specifications
The contract and quotation should identify the exact miner rather than only mentioning a product series. Models with similar names may have different hashrates, power consumption and cooling requirements.
Confirm the following information:
- Manufacturer and complete model name
- Mining algorithm
- Rated hashrate and acceptable tolerance
- Rated power consumption
- Energy efficiency
- Input voltage
- Cooling method
- Power supply and cable inclusion
- Production batch
- New, used or refurbished condition
- Remaining warranty
The algorithm must match the cryptocurrency you intend to mine. Bitcoin uses SHA-256 hardware, while Litecoin and Dogecoin require Scrypt ASIC miners.
Hashrate, Power and Voltage
Higher hashrate does not automatically mean higher profit. Compare hashrate with wall-side power consumption and calculate how much electricity the machine will use.
Daily electricity consumption is calculated as:
Power in kW × 24 hours
A 3.5 kW miner consumes approximately 84 kWh per day when operating continuously. Multiply this figure by the electricity rate and include pool fees, cooling, maintenance and hosting costs.
The destination facility must also support the machine’s required voltage, plugs, breakers and power distribution. Hydro-cooled miners require compatible water-cooling infrastructure, while immersion models require an appropriate tank and coolant system.
For an example of how equipment specifications affect mining returns, see the Whatsminer M60 and M61 Profitability Guide.
New, Used or Refurbished Condition
The sales contract must state whether the machines are new, used or refurbished.
A machine advertised as new should not contain heavily used or repaired components. Original packaging alone does not prove the equipment is new.
Used miners may offer better initial prices, but buyers should examine:
- Exterior corrosion and dust
- Repair labels or soldering marks
- Fan and power-supply condition
- Detected hashboards and chips
- Operating temperatures
- Stable hashrate
- Hardware error rate
- Remaining manufacturer warranty
For refurbished equipment, request a report identifying the repaired or replaced parts and the supplier’s post-repair warranty.
Check Pricing and Payment Terms
ASIC prices can change with cryptocurrency markets, manufacturer inventory and mining profitability. The quotation should state how long the price remains valid and when it becomes fixed.
Product Price and Additional Charges
Compare the total landed cost rather than only the unit price. Ask whether the quotation includes:
- Miner and power supply
- Inspection and testing
- Export packaging
- Transportation within China
- Export declaration
- International freight
- Cargo insurance
- Import duties and taxes
- Delivery to the final destination
A low unit price may become expensive after freight, taxes and missing accessories are added. If the miner will be hosted, also include setup deposits, electricity and management fees.
Cryptocurrency and Bank Transfer Risks
A company bank transfer creates a clear payment record when the account belongs to the contracted seller. Investigate requests to pay an individual or an unrelated company.
Cryptocurrency payments are fast but usually difficult to reverse. If paying with cryptocurrency:
- Add the wallet address to the invoice
- Verify it through a second communication channel
- Check the complete address carefully
- Consider sending a small test payment
- Save the transaction hash
- Obtain a signed payment receipt
Treat unexpected changes to bank or wallet details as potential fraud. Confirm them using contact information verified before the change.
Deposit and Final Payment
Avoid paying the full amount to an unverified supplier before inspection. A staged payment arrangement can connect each payment to a specific milestone.
A typical structure may include a deposit after contract signing, followed by the balance after inventory confirmation, serial-number recording and successful testing.
The contract should explain whether the deposit will be refunded if the supplier cannot deliver the specified model, the miners fail inspection or delivery is seriously delayed.
Inspect and Test the Mining Machines
Testing before export is essential, especially for used or refurbished ASICs. Discovering defects after international delivery creates additional repair, shipping and customs costs.
Serial Numbers and Product Labels
Record the serial number of every miner and power supply. Compare these identifiers with the product labels, test reports, commercial invoice, packing list and cartons.
Where the manufacturer provides an online warranty tool, use the serial number to check coverage. A machine described as new may have already lost part of its warranty because coverage can begin from the manufacturer’s original shipment date.
The contract should include an equipment list showing the model, hashrate, condition and serial number of every unit.
Hashrate and Stability Testing
Each machine should run long enough to reach stable operating conditions. A screenshot taken immediately after startup is not sufficient.
Testing should confirm:
- All hashboards and chips are detected
- Average hashrate meets the agreed tolerance
- Wall-side power consumption is acceptable
- Temperatures and fan speeds are stable
- Hardware errors are not excessive
- Pool rejection rates remain reasonable
- The miner does not restart unexpectedly
Request miner-dashboard data and pool-side hashrate because pool information shows how much useful work the machine actually delivers.
Inspection Report and Evidence
The report should include the test date, duration, model, serial number, hashrate, power draw, temperature and final result.
Request photographs or live video showing the serial number, miner dashboard, power measurement and final packaging. For a bulk order, define how many machines will be tested and what happens when a unit fails.
Review Shipping and Customs Requirements
The buyer and seller should agree on who handles transportation, export procedures, insurance, import clearance and final delivery.
Use a recognized Incoterms rule with a named location, such as FCA Shenzhen or DAP at the buyer’s specific address. ICC Incoterms help allocate shipping costs, tasks and risks, but they do not replace the complete sales contract.
Shipping, Insurance and Packaging
Air freight is faster, while sea or rail transport may be more economical for larger orders. The best option depends on order value, destination and required delivery time.
ASIC miners must be protected against impact, moisture and electrostatic damage. Confirm packaging standards before dispatch and insure the shipment for its full commercial value.
Photograph damaged cartons immediately upon arrival. Notify the carrier and insurer within their claim deadlines before discarding any packaging.
Import Duties and Customs Documents
China export procedures and destination-country import procedures are separate. The General Administration of Customs of China provides official information about Chinese customs declarations.
Common shipping documents include:
- Commercial invoice
- Packing list
- Transport document
- Serial-number list
- Certificate of origin when required
- Insurance certificate
Import classification, duties, VAT and certification requirements vary by country. Ask the destination customs authority or a licensed customs broker to confirm them before shipment.
Do not request an artificially low customs value or inaccurate product description. False declarations can cause penalties, confiscation, delays and rejected insurance claims.
Loss, Damage and Delay Responsibilities
The contract should identify when transportation risk passes from the supplier to the buyer. It should also state who selects the carrier, purchases insurance, files claims and pays storage charges caused by customs delays.
Link every shipping carton to the serial numbers inside it. This makes it easier to identify missing or damaged equipment.
Understand Warranty and After-Sales Support
A warranty has value only when its duration, responsible party and repair process are clear.
Manufacturer and Supplier Warranty
Do not assume that a new miner has a full warranty starting on the buyer’s delivery date.
For example, BITMAIN’s warranty policy explains that coverage is generally calculated from the manufacturer’s official shipment date and remains subject to the sales contract. Policies differ by model and may change.
Check the serial number and ask:
- How much manufacturer warranty remains?
- Is the warranty transferable?
- Who pays repair transportation?
- Is an authorized repair center available nearby?
- Which damage or modifications cancel coverage?
A supplier warranty is separate from the manufacturer warranty and should also be provided in writing.
Repairs, Returns and Disputes
The contract should state what happens if the wrong model arrives, a hashboard fails or hashrate falls below the agreed tolerance.
Confirm repair locations, response times, parts charges and post-repair testing. Also establish who pays international shipping, import charges and insurance for a returned miner.
For large orders, include the governing law and dispute-resolution method in the contract. Cross-border disputes can be expensive, making verification before payment especially important.
Red Flags to Avoid When Buying Miners from China
Stop the transaction when the supplier cannot resolve important inconsistencies.
Major warning signs include:
- Prices far below comparable market offers
- Refusal to provide a business license
- No live inventory or testing evidence
- Used miners represented as new
- Missing or altered serial numbers
- Payment requested to an unrelated account
- No written warranty or return procedure
- Pressure to pay the full amount immediately
- Requests to falsify customs documents
A legitimate discount does not remove the need for supplier verification and machine testing.
Conclusion: How to Buy Mining Machines Safely in China
Buying cryptocurrency mining machines in China can be safe when the transaction follows a structured procurement process.
Verify the supplier through official records, inspect its facility and confirm its relationship with the manufacturer. Define the exact model, hashrate, power consumption, condition, serial number and warranty status in the sales contract.
Use staged payments, arrange testing before shipment and calculate the complete landed cost. Shipping terms, cargo insurance, customs responsibilities and after-sales procedures should be agreed upon before the equipment leaves China.
If the company, machine condition, payment recipient or warranty cannot be independently verified, do not complete the purchase.
Buying Mining Machines in China FAQs
Is It Safe to Buy ASIC Miners from China?
Yes, buying ASIC miners from China can be safe when the supplier and machines are independently verified. Use a written contract, pre-shipment inspection, staged payment and insured transportation.
How Can You Verify a Chinese ASIC Supplier?
Check the supplier’s Chinese legal name and Unified Social Credit Code through the official enterprise registry. Also verify its warehouse, company account, customer history and physical inventory.
Should You Buy New or Used Mining Machines?
Buy new miners when predictable condition and manufacturer warranty are priorities. Used miners may cost less, but they require more detailed testing and carry greater repair risk.
Who Pays Import Duties and Customs Fees?
Responsibility depends on the contract and agreed Incoterms rule. Confirm the importer of record, applicable duties, taxes and customs-broker charges before shipment.
How Should ASIC Miners Be Tested Before Shipping?
Test each miner’s average hashrate, power consumption, hashboards, chip count, temperatures, fans, hardware errors and pool-side performance. The test report should identify the machine by serial number.
