1. If it is your own funds (you are from China and your funds are in China), just go to a commercial bank to exchange them. You have a large amount, so you can discuss the exchange rate with commercial banks. There is cash and cash here, but I guess you are cash. Cash of 654.38+0 billion is unrealistic.

2. If you invest from abroad and enter China, you first need relevant domestic approval, that is, you are allowed to engage in related projects, and then the overseas money will be transferred to your foreign currency account opened in a domestic commercial bank, and then you will apply to the local State Administration of Foreign Exchange for approval of overseas investment, and then take the approval to the commercial bank to settle foreign exchange, that is, RMB will be formed and transferred to your RMB account. After foreign exchange settlement, you can't stay in your RMB account. It must be transferred to other accounts you need to pay within two days, such as the account of the material supplier, so you need to make a detailed account of the use of foreign exchange settlement funds in advance and transfer the funds according to the details.

PS: At present, the entry of overseas funds into China for real estate investment is strictly controlled. Good luck.