Hainan Litree Purifying Technology Co,. Ltd., locates in Haikou city, which is in the north part of Hainan Island . Beautiful views there are quite attractive to the tourists, sunshine, beach, ever-green plants etc. Especially moderate-humidity, fresh air and the yearly average temperature of 23.8'C are extremely advantaged to produce membrane. That is one of the reasons that Litree provides excellent membrane.