Is Sinochem Donghua Tianye New Materials Co., Ltd. a central enterprise?

No, central enterprises refer to state-owned enterprises supervised and managed by the central government. According to Aiqi, Sinochem Donghua Tianye New Materials Co., Ltd. is a state-owned enterprise jointly controlled by Donghua Engineering Technology Co., Ltd. and Xinjiang Tianye Co., Ltd., so Sinochem Donghua Tianye New Materials Co., Ltd. is not a central enterprise.