5% in theory. Paternity appraisal must be conducted at the local judicial appraisal institution. For details, please consult the local judicial bureau or the Justice Department of this province, or check the directory of local formal judicial authentication institutions in official website. Many online organizations claim to be able to do paternity testing, so it is recommended to choose carefully to avoid being fooled. The price is generally around 3, so be careful if it is too high or too low.