Y, I want to know what proof is needed to transfer social security from Shenzhen to Leizhou.

You can go directly to Shenzhen Social Security to print a certificate of participation, which will have detailed payment time, amount and other records. With this certificate, you can go to Leizhou Social Security Bureau to go through the collection procedures.

Another is that you have to open a receipt at the receiving place first, and then come to Shenzhen to handle the insurance receipt.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.