I agree with the people saying that the problem of this topic is that because of asymmetric information (IS). Additionally, due to the IS, TWO main problems will be discovered: 1) adverse selection (AS); 2) moral hazard (MH). Thus, there are needs to individuals, milk manufacturers, and even government to consider that how to reduce or eliminate these existing problems. Obviously, it is very easy to economists to understand and handle this phenomena in theoretical side. The solution can be divided into four steps mainly: 1) searching; 2) verification; 3) monitoring; 4) enforcement.
However, another question derived from these steps, that is who has capable to do these. A good example of financial market system can be introduced, the intermediaries. Thus, my sight is that sector like the financial intermediaries can be established, it could not only reduce the problems mentioned above and also unemployment in China, even though the World Bank shows that the unemployment rate of China is under 5% from 2010 to 2013. If, however, to compare with unemployment of the UK and the U.S., it is 3% less than both of them. therefore, the data of unemployment in China could be doubtful (I have been living in China for years and now am living in the UK).
To summarise, it is inspiring to not merely Chinese citizens but also the government if implication of intermediation exists, or if it has existed already please use the function you are holding.