Which branch of chemical architecture is better?

There are five major companies in China Chemical 13th Company: civil engineering company, installation engineering company, water and electricity installation engineering company, boiler installation engineering company and electrical instrument installation engineering company. Because China Chemical 13th Chemical Construction Engineering Co., Ltd. is headquartered in Cangzhou City, Hebei Province. Cangzhou Big Fertilizer Plant, which undertakes the project of Cangzhou Chemical Industry Group Company, is a large-scale construction project undertaken by Sinochem 13th Construction Company.