Hengdian Group The company was established in 1975, and is now one of the largest private-owned enterprises in China. The Pharmaceutical & Chemical division has 3 sub-companies with over 3,500 employees of which over 30% are technicians. This division focuses on producing APIs with related intermediates as well as other special chemicals. The group also focuses on custom manufacturing service under GMP /non GMP and confidential agreement with our clients.