What about Beijing Yuxin Technology Development Co., Ltd.?
The company rules of this company are disgusting. A friend of mine used to do outsourcing in Guangzhou Yuxin. The salary used to be 13. Later, it was euphemistically called stimulating work enthusiasm and changed to a bonus system. Originally, it was supposed to be calculated once every quarter, but my friend worked for a year and got excellent comments from customers every six months. As a result, he still didn't get any bonus. Why? Because they said the mantissa was confiscated and they kept dragging it. After employees leave their jobs, bonuses will naturally disappear. Smart move. Moreover, the conditions of Yuxinkai are lower than those of other outsourcing companies.