In an effort to reduce pollution, China has been cracking down on high-emission vehicles. This has led to an increase in the number of recycling centres and scrapyards dealing with cars, trucks and buses that cannot pass the annual inspection.

In recent years, more and more people have realised that smog is a big threat to their daily life and the Chinese government has vowed to wage a battle against air pollution, actively pushing for green upgrades to vehicles and setting ambitious carbon-cutting targets.

But with an increasingly affluent society, more consumers are buying cars - even if not all of them meet environmental standards.

As China cracks down on older, heavily polluting models, vehicles are piling up at scrapyards around the country like those in Zhejiang province, as well as in Chongqing city, where yellow taxis are typically discarded.