Does Ping An Bank require proof of source of funds for deposits?

No need.

I have never heard of banks requiring proof of source of funds when depositing money. No, no proof of source of funds is required, no matter how much money is deposited. Just provide your ID card. Although this list may not seem too cumbersome, in practice, in addition to the above types, the Immigration Bureau will require investors to provide a large number of documents to prove the legality of the source of funds. Although the EB-5 rules do not require investors to prove any source of funds other than investment capital, USCIS will also require investors to prove the legality of administrative fees charged in the name of the project. Many programs charge administrative fees to cover operating costs and marketing expenses.