You know very little about agriculture in China I would guess. Short answer: no you don't. Long answer: we've had chicken, milk, pork, rice scares all in the last few months.
(While I agree with your point, alarm bells go off when I read lists of 'events' with no references)
Pork is always problematic since those babies are basically general waste recycling machines, it's hard to figure out what the nongmin are feeding them. Not sure of anything specific though, eventually all these scares start blurring together and I just stop caring too much.
Because agriculture is such a thankless job here, and gov regulation is weak, there is a lot of incentive for nongmin to cheat without much disincentive. And to be honest, the "industrialization farmed" or GMO food that many westerners are worried about....well, those are first world problems that we'd love to worry about instead.
Milk 2008: (https://en.wikipedia.org/wiki/2008_Chinese_milk_scandal) (http://news.bbc.co.uk/1/hi/world/asia-pacific/7614083.stm)
Milk 2010: (http://online.wsj.com/article/SB126255525849313997.html)
Milk 2013: (http://www.bbc.co.uk/news/business-22088977)
Glow in dark pork: (http://www.telegraph.co.uk/news/worldnews/asia/china/8544851...)
Waste oil from gutters outside restaurants repackaged and sold for consumption: (http://www.telegraph.co.uk/news/worldnews/asia/china/7971983...)
In addition, it's seems non of them relate to China's intentional avoidance of modern technology in farming...