first of all, explain "off-site transfer": it means that your fund is hosted there, and all the lof funds you applied for in banks or securities firms are in "Shenzhen open-end fund account (Shenzhen TA)", which is "off-site"; The opposite "venue" is the Shenzhen Stock Exchange, which is the A-share market. They are two different trading systems. Off-exchange can only be purchased and redeemed (by net value), while on-exchange can buy and sell at market price like stocks, and at the same time, it can also be purchased and redeemed. Off-site transfer is free, and internal transfer is outside 3 yuan.

furthermore, you should contact or go to the counter staff of the securities company in person to transfer the custody business, because they handle the specific business, and others may not understand it. The counter will let you fill out the form or something.