The huge blast at a chemical factory in Tianjin on 12 August, which killed around 150 people, was China's worst industrial accident for several years. Since then there have been two more explosions in Shandong province, and now another in Zhejiang province on Monday. There have been at least 38 explosions so far this year at chemical plants, firework factories and mines. Among the causes are a lack of oversight, local corruption and attempts to boost profits by employing less qualified workers or ignoring safety protocols. These problems are endemic to most areas of the Chinese economy, whether it be food provision, the rail network or domestic tourism, all of which have seen serious accidents or health scares in recent years.