Mainland Chinese individuals who are interested in buying virtual coins in the United States have a few options available to them. Here are some common ways that they can purchase virtual coins:

1. Online Exchanges: One of the most popular ways for Mainland Chinese individuals to buy virtual coins in the United States is through online exchanges. These platforms allow users to buy, sell, and trade virtual coins using various payment methods, such as bank transfers or credit cards. Some of the most well-known exchanges include Coinbase, Binance, and Kraken.

2. Peer-to-Peer Platforms: Mainland Chinese individuals can also buy virtual coins through peer-to-peer platforms, where they can connect with other users looking to buy or sell virtual coins. These platforms often offer a more direct and personalized trading experience, but users should exercise caution when trading with strangers online.

3. Over-the-Counter (OTC) Trading: Another option for Mainland Chinese individuals looking to buy virtual coins in the United States is through over-the-counter (OTC) trading. This method involves trading virtual coins directly with a broker or dealer, who facilitates the transaction between buyers and sellers. OTC trading is typically used for large transactions and can offer more privacy and security compared to traditional exchanges.

4. Crypto ATMs: Mainland Chinese individuals can also buy virtual coins using crypto ATMs, which are physical machines that allow users to purchase virtual coins using cash or credit/debit cards. These ATMs are becoming more common in the United States and can be found in various locations, such as shopping malls, convenience stores, and airports.

5. Mobile Apps: Lastly, Mainland Chinese individuals can use mobile apps to buy virtual coins in the United States. These apps offer a convenient way to buy and sell virtual coins on the go, and often come with features such as price alerts, portfolio tracking, and secure storage options.

In conclusion, Mainland Chinese individuals looking to buy virtual coins in the United States have several options available to them, including online exchanges, peer-to-peer platforms, OTC trading, crypto ATMs, and mobile apps. It is important to research each option carefully and choose a method that best suits their needs and preferences.