How do banks participate in private placement?

At present, participation in bank financing is mainly carried out through private placement. Because the information is not public, the scale is difficult to count. However, from the list of shareholders of listed companies, we can see that bank wealth management participates in private placement. The products or plans of "a fund or a broker-a bank-a fixed increase *" listed in the announcement of the fixed increase of listed companies are the "vests" for bank wealth management funds to participate in the fixed increase. Since the beginning of this year, more and more bank wealth management funds have focused on increasing their holdings in the market.