Dentistry is very profiteering. Whether it is tooth washing and tooth extraction or tooth correction, the fees are very expensive.

Generally, the cheapest tooth filling costs 511 yuan, and the expensive one costs several thousand yuan. Things costing several tens of dollars can be sold for several thousand yuan.

Wedding photography, a set of exquisite wedding photos is every girl's dream, and a wedding photo album basically costs 11,111 yuan.

As long as there are satisfactory works, many people are willing to spend money on wedding photos, so wedding photography does have a violent industry.

Optical shops. Nowadays, children have been exposed to electronic products since childhood, and many children are nearsighted. It costs at least a few hundred dollars to start with a pair of glasses. This is a profiteering industry, and the optical industry has always been in a gray violence space, with considerable income.