There is such an allegorical saying about porcelain: tinker takes porcelain work one by one. Mending the pot is a simple craft that is not at the same level as porcelain living technology. A tinker who gets to work on China is pretending to be an expert. So: tinker porcelain work one by one filled expert.
Do not work on porcelain without diamond.
People often say that \"no diamond, do not hold porcelain\" allegorical, is from the curium art in this line when out.