According to the salary system of China municipal government, the fourth-level deputy is a rank of civil servants, and the salary level is relatively high. The salary of the fourth-level deputy consists of basic salary, allowance and subsidy, and the salary of the director of the post sub-office depends on the specific rank and place of work. Although the post of post office director is higher, the salary of the fourth-level deputy is often higher because of the different salary system.