Changzhou Chentiansheng Biological Technology Co., Ltd. is one of the holding companies of Hengtong group which holds more than hundred million fixed assets, and covers an area of 160,000m2. The Biological company makes full use of the Hengtong group advantages and develops the Tiansheng â ¢ forest source which not only applies to environmental purification area but also to prevention and health care, relaxation, construction material, energy saving and environmental protection.The Tiansheng â ¢ forest source has the following functions:1. Fast and effectively decompose many kinds of toxic and hazardous constituents after decoration, such as Formaldehyde, Benzene, Ammonia, TVOC, etc 2. Eliminate germs and clean the air of rooms, public places, meeting rooms, etc3. Absorb and purify indoor smoke, musty, ammonia, urea molecules4. Extend the fresh cycle of fruit and food indoor and make flower living5. Protect and Maintain desk, chair, sofa, etcTill now a lot of offices, schools, homes, hotels, and entertainment places in China have been equipped with the Tiansheng â ¢ forest source.