Folk borrow the word inlaid with gold, and add a vulgar thing in front of it, pointing to different places, but the meaning is similar. This statement is not only useful, such as Beijing Xiehouyu, "The mouth of the night kettle is inlaid with gold, and the mouth is good."
Chamber pot was originally a common thing for men to collect urine on old winter nights, and it was also the least valuable pottery. However, the mouth of the night kettle should be inlaid with Phnom Penh. This is to improve the quality of this vulgar utensil under the guise of precious materials, but the vulgar utensil will eventually become vulgar and its essence cannot be changed. This kind of two-part allegorical saying is to use vulgar things to embed gold, satirizing someone who has no strengths but is good at talking. This sentence has a strong derogatory meaning for some people who speak in an orderly way but can't do anything.