Recently, the “2010 National Ministry of Health Central and Western Region Children’s Oral Disease Comprehensive Intervention Project” was launched in Urumqi City Dental Hospital. Children aged 7-9 years old in Urumqi can go to the pediatric dentistry of Urumqi Stomatological Hospital to have their first permanent molars “sulcus closure” for free with their local family register or notification letter issued by their schools. Liang Hui, Department of Pediatric Dentistry, Urumqi Stomatological Hospital All children born after January 1, 2002 and before December 30, 2004 can bring their family register to the nurse’s desk of Pediatric Dentistry of Urumqi Stomatological Hospital to make an appointment for free fossa closure.