Global Oxygen Restriction

When Li Ming woke up, he was fired from work because his breathing rate was high and did not meet the company's energy conservation and emission reduction regulations. After the dismissal, he was not given any money, but was given compressed oxygen coins. Li Ming was confused. He paid for something and was scolded for being stupid and using paper to pay. Then he discovered that he had traveled to a parallel world where oxygen was used to trade items and others had a daily breathing limit. However, Li Ming had previously started a business selling oxygen bottles, and now he became rich! ! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.