I don't know about "bad governing". It sounds more like a rigorous containment policy when nuclear technology was at its infancy in China. (Regulations are written in the blood of your predecessors - https://old.reddit.com/r/LifeProTips/comments/ud3lt4/lpt_osh... ). It is also about preventing accident leakage of information and preserving secrecy. For e.g. In the 1970s, India learnt that Pakistan was working to create a nuclear weapon when Indian agents in Pakistan collected hair samples of Pakistan's nuclear scientist, from a barber shop where they got their hair cut - traces of plutonium radiation were found in the hair samples, and Pakistan's nuclear weapons program got exposed.