Imported second-tier brands include Iranian Petrochemical, Mexican Petrochemical, Mitsui and Aksu.
Domestic first-line brands include Yangzi BASF. The second line includes Maoming Petrochemical, Maoming Zhongke and Jiahua Chemical.
If you are not sensitive to price, you can choose to import first-line brands. If the cost performance is high, choose the domestic second line.