TSL(Topseller Chemicals Company Limited ) a proprietary company attached to Shandong Chunlong Group was established in 1990.Located inYantai ,Shandong province TSL has a distance of 1800 kilometres from Qingdao Port ,100 kilometres from Yantai Port and 6kilometres from Longkou Port ,enjoying the advantage of traffic .Today ,TSL has 560employees and takes over 10 thousands square meteres from which 20thousands quare meteres is for storage .By now ,TSL has two sets of production machines ,which could produce 80 thousand ton powder by high tower spraying and 20 thousand ton concentrated powder,respectively. Every year 100 thousand ton specialized detergent of top grade ,meduium,or low-end is produced.TSL is the only one specialized large-scaled complexed scour for production in the area of Qingdao Yantai and Weihai.