In addition to sweat and dirt, there are a lot of pathogenic microorganisms, cancer causing mold and electronic dust that damage the brain.

Because these kinds of injuries are latent, they are unknowingly occurring and have not attracted the attention of the Chinese people.

With the popularization and improvement of people's health consciousness, a new type of occupation and market has been placed in front of people.

In a small city, there are not less than 100 thousand phones and mobile phones, and more than 1 million medium-sized cities.

If each phone is cleaned two times a year, each time it charges 3 to 5 yuan, the market income of a region will be at least 2 million yuan a year.

The cost of cleaning a phone or mobile phone is 0.2 yuan to 0.3 yuan, and only 1000 yuan for a national patent instrument and its special foam.

The annual ticket system can be implemented in the way of operation.

A household of 30 yuan / year, cleaning the phone, mobile phone two times, drinking machine two times, refrigerator deodorization 1 times, implementation of small profits to start the market, lock the source of tourists, you can also advertise properly.

Moreover, if there are contacts with some stores and monopoly counters, such as launching a "buy 50 yuan instant phone and cell phone ticket", smart businesses will be happy to accept this idea.