When the China Petroleum and Chemical Industry Federation announced its list of most energy efficient companies within the petrochemical industry (for 2020) in October, it recognised tyre maker Prinx Chengshan as a leading ‘Energy Efficiency Benchmark Company’ for the sixth year in a row. Prinx Chengshan attributes these half-dozen consecutive accolades to its focus on sustainability in recent years, including energy and materials conservation as well as efforts to promote a circular economy.