LIANYOU.LIANYOU, established in Jinan in 2002, is a petrochemical engineering service provider with a registered capital of 64 million yuan. The company employs over 1,100 professionals, including 160 technical personnel and 28 Class-A construction engineers. Specializing in petrochemical plant construction, maintenance, and special equipment manufacturing, LIANYOU achieves an annual output value of 550 million yuan. Certified under ISO 9001 and other systems, the company delivers specialized services to meet the full-chain needs of the petrochemical industry.