Which company has better quality of PPS plastic raw materials?

Domestic: Guangzhou Jinfa, Guangzhou Huadu Keyuan, Guangdong Jubilee, Guangdong Conghua Jusailong, Guangzhou Heshibi, Shanghai Jieshijie;

Shanghai Sun Voice New Technology Development Co., Ltd.; Shanghai Jinhu is very beautiful; Nanjing Dragon; Changshu AIA Engineering Plastics Co., Ltd. ranks among the top 30 in China.