Don't China people need a green card to buy a house in Britain?

Yes, China people can buy real estate in Britain.

There is no law restricting non-British residents from buying houses in Britain, and China people can buy houses in Britain according to British laws and regulations.

However, it should be noted that the purchase of real estate may need to meet certain conditions, such as providing proof of the source of funds. In addition, the process of buying a house involves the land laws and tax laws of the United Kingdom. It is recommended to consult a professional lawyer or real estate agent before buying to understand the relevant laws and regulations.