CONTACT US AOKAI OIL TOOLS CO., LTD. Tell: +86 22 58571258 Phone: +86 17622865993 Email: nby@oilchemtj.cn WhatsApp ID: +86 17622865993 WeChat ID: +86 17622865993 Address: Lianmeng Industrial Park, Hongqi Road, Dagang Oil Field, Binhai New Dist., Tianjin, China