Ban Chap Hanh Lien Doan Lao Dong Huyen Thanh Son Address: Hoang Son Street, Thanh Son Town, Thanh Son District, Phu Tho Province Enterprise code: 2600623105 Phone: 02103873221 Thanh Son Town, Thanh Son District, Phu Tho ProvinceFounding date: 12 - 8 - 2009