I only know about the micro-loan guarantee fund, which refers to a fund that is stored in a special account in the handling bank and operated in a closed way, and is specially used for the guarantee institution to provide guarantee for the borrower's loan to the handling bank.

there is also a guarantee base. Guarantee fund is a collective investment plan, which guarantees investors to receive a predetermined amount on a specified date. The guaranteed amount may include a percentage of the principal. Some guarantee funds will provide additional rate of return guarantee higher than the principal.