Yantai ZK Optics Co., Ltd. (ZKTD)

Add.: No. 3, Laishan Road, Bailinzhuang Street, Laiyang City, Yantai, Shandong Province, China

Tel.: +86-535-7665785

E-mail: sales.x@zktdoptics.com

Beijing ZK Optics Co., Ltd. (ZKTD)

Add. 1: Jidong Industrial Park, Qianbaihujian, Yangfang Town, Changping District, Beijing, China

Add. 2: China Railway Entrepreneurship Building, Pingguoyuan South Road, Shijingshan District, Beijing, China

Tel.: +86-10-69769891

E-mail: sales.x@zktdoptics.com