No charge. Hepatitis B is one of the most important infectious diseases under control in China. When a prisoner is taken into custody, the detention center shall conduct a health examination on the prisoner. According to the regulations of China's detention centers, "people suffering from mental illness or acute infectious diseases" are not taken into custody, including those taken into custody in Dongguan No.2 Prison. Dongguan No.2 Prison is located in Dayouyuan Village, Dalang Town, Dongguan City, also known as Dayouyuan Detention Center or Da Lang Detention Center. There is also a Dongguan detention center in this branch, so it is also called Dongguan Reception Education Center.