Examples? Like, are things not clearly labeled?
The national government, only as of a few years ago, began implementing regulations on chemical process safety that the rest of the world had already started using decades ago. That's nice, except still, all along, the government leaves enforcement of these regulations up to local officials and leaders. China has extremely high corruption, so these local officials are bribed and look the other way and neglect proper enforcement of these regulations. So companies get away with all sorts of unsafe working conditions at petrochemical sites.
In general, China doesn't encourage a culture about safety or sustainability in industry, particularly with chemicals. They don't value human life. As an anecdotal example, we would have Chinese PhD student that came to my university to study chemical engineering that would stick their heads into the fume hoods and expose their faces to toxic chemicals just because they couldn't be arsed to use the proper protective equipment to run their experiments. The rest of us in the lab would be like "what the fuck, wear your gloves, put on your goggles, and keep your face out of there!" but they would conveniently forget or ignore.
Even when I asked my friends studying chemical engineering in Tianjin if they were okay the other week, they responded strangely nonchalantly. "No, everything is okay, the explosion happened on another street but we are fine." Like...just weird responses for such a tragedy from what are my colleagues.
