How to Purchase Old Bitcoin (BC) Using 21X Diamonds (21X) in China

To buy Old Bitcoin using 21X Diamonds, first, find a cryptocurrency exchange that supports the BC/21X trading pair. Create an account, complete the KYC process to verify your identity, and deposit your 21X into your exchange wallet. Locate the BC/21X pair on the trading platform and place an order to exchange your 21X Diamonds for Old Bitcoin. If the BC/21X pair is unavailable, you can first exchange 21X Diamonds for a stablecoin like Tether (USDT) or a fiat currency such as CNY, then trade that for Old Bitcoin. Be mindful of potential exchange fees, which vary by platform and can impact the overall cost of your transaction.