Legal basis: Civil Code of People's Republic of China (PRC).
Article 7 Civil subjects engaged in civil activities shall follow the principle of honesty and credit and abide by credit.
Article 8 Civil subjects engaged in civil activities shall not violate laws, public order and good customs.
Article 9 Civil subjects engaged in civil activities should be conducive to saving resources and protecting the ecological environment.
Article 10 Civil disputes shall be handled according to law; Where there are no provisions in the law, customs can be applied, but they must not violate public order and good customs.