People often have complex relationships, helping others or being hindered by others, often apologizing and thanking are revealed, this is wrong. This system evaluates the favor value of apology and thanks to be converted into physical objects to repay the favor value. One is to look at the impact of repayment on the host, the other is to look at the impact of the host on the object of repayment, and the other is to look at the attitude of the repayer himself. If the host is about to be beaten to death, this has a greater impact on the host. Therefore, although Xu Guiming has no apology, the favor value is also very large, and Wu Yuting, who is the shield of the ignorant host, has a greater favor value. She also has a greater favor value for guilt towards the host.