HONG KONG DO COENG TRADE LIMITED， Main products include process control instruments, rust removal lotion, high barrier medical packaging materials (PVDC lotion), household and industrial and commercial energy storage batteries, etc< Subsidiary: Xiamen Duoxiang Electromechanical Technology Co., Ltd; Xiamen Yuanai Technology Co., Ltd; Established by Xiamen Shanshui Tsinghua Technology Co., Ltd.
