The trading pair #交易对 refers to the exchange relationship between coins, such as BTC/USDT which indicates purchasing BTC with USDT. Common trading pairs include BTC/USDT, ETH/USDT, BNB/USDT, etc. These pairs typically have high liquidity, low slippage, and quick transactions, making them suitable for beginners. There are also some small coin trading pairs like DOGE/USDT and PEPE/USDT, which, although highly volatile, come with high risks. When choosing trading pairs, one should pay attention to factors such as liquidity, trading volume, and platform support to ensure a good trading experience and security.