2nd World Congress on Internal Combustion Engines held in Jinan

People visit the 2nd World Congress on Internal Combustion Engines in Jinan, east China's Shandong Province, April 21, 2021. 

People visit the 2nd World Congress on Internal Combustion Engines in Jinan, east China's Shandong Province, April 21, 2021. 

A man visits the 2nd World Congress on Internal Combustion Engines in Jinan, east China's Shandong Province, April 21, 2021. 

Grand bridge of Guiyang-Nanning high-speed railway under construction Minjiang River estuary nature reserve in Fujian, SE China