F4 immigrant visas in the United States have been widely issued, but I am not very confident in the applicant's guarantee. How can I guarantee myself?

The guarantor's financial guarantee is not enough. According to American immigration law, it can be guaranteed by the guarantor's own financial resources. The cash value of your assets requires at least five times the difference between the guarantor's income and the minimum income line. Need to sign I-864A, you can use personal bank deposits, stocks, etc. In addition to using your own assets, you can also find a joint guarantor. For relevant knowledge, please refer to the article "USLawChina deeply interprets American life insurance I, II and III".