Xiao Li works in a law firm and his monthly income belongs to

Belongs to the distribution of income according to work.

The so-called distribution according to work means that under the condition of socialist public ownership of the means of production, after all necessary social deductions are made to the total social products, individual consumer goods are distributed according to the quantity and quality of labor provided by each person to the society. Within the scope of socialism, more work and more pay, less work and less pay, bonuses and allowances all belong to this scope, and all income earned in enterprises belongs to distribution according to work, so Xiao Li works in a law firm, and his monthly income belongs to distribution according to work.