What is the quality of asphalt produced by Ningbo Zhenhai Refining and Chemical Company?

Donghai brand asphalt in Zhenhai Refinery of China Petrochemical Company is one of the most influential asphalt brands in China, and won the title of "China Famous Brand Product" in 2007. According to the national standards GB/T 15 180-2000 "Heavy Traffic Road Petroleum Asphalt" and JTG F40-2004 "Technical Specification for Highway Asphalt Pavement Construction", various high-quality "Donghai Brand" are produced. Shanghai F 1 and Qinghai-Tibet Plateau Expressway all use his asphalt.