During the Pakistan anti-dumping investigation on polyester staple fiber products from China, Rayyin & Partners represented Jiangyin Huafang Technology Synthetic Fiber Co., Ltd., Taicang Risheng Import & Export Co., Ltd. of Jiangsu Guoxin Group, and Jiangyin Nanyang Color Fiber Masterbatches Co., Ltd. On December 21, 2012, Pakistan's investigation authorities made its preliminary decision on this investigation. Of all the 11 respondent enterprises, Jiangyin Huafang Technology Synthetic Fiber Co., Ltd. and Taicang Risheng Import & Export Co., Ltd. of Jiangsu Guoxin Group won 0 tax rate during the preliminary decision, Jiangyin Nanyang Color Fiber Masterbatches Co., Ltd. achieved a good results of 2.09% low tax rate in the preliminary decision.