What are the consequences of fraudulently using someone else's ID card to apply for social security?

According to the relevant documents, people who use other people's ID cards to handle business will be fined or even detained by the public security organs, and those who have illegal income will be confiscated.

People's Republic of China (PRC) Identity Card Law

Sixteenth one of the following acts, given a warning by the public security organs, and impose a fine in 200 yuan, illegal income, confiscate the illegal income:

(a) using false certification materials to defraud the resident identity card;

(2) Renting, lending or transferring a resident identity card;

(3) illegally detaining another person's identity card.

Seventeenth one of the following acts, by the public security organs fined two hundred yuan to one thousand yuan, or detained for ten days, illegal income, confiscate the illegal income:

(a) using another person's identity card or using a forged identity card;

(2) buying, selling or using forged or altered identity cards.

Forged or altered identity cards and fraudulent identity cards shall be confiscated by public security organs.