A businessman in China has announced that his workers can take days off if they're not in a good mood. It has been called "unhappiness leave." And Yu Donglai, who is the founder of a supermarket chain called Pang Dong Lai, said his employees can use 10 days of this leave each year. "I want every staff member to have freedom. Everyone has times when they're not happy, so if you're not happy, do not come to work," Yu said earlier this year. He added that shop managers cannot deny workers this leave if they ask for it. This leave is in addition to the days off that the company's employees already have. According to the South China Morning Post, Pang Dong Lai workers get between 30 and 40 days of leave each year, as well as five days off during New Year. Their working days are seven hours long, and employees don't work on weekends. Yu said of his company: "We do not want to be big. We want our employees to have a healthy and relaxed life, so that the company will too." The average monthly salary at Pang Dong Lai is about $970, which is much higher than the average in China for workers in similar jobs. Yu has 13 shops in Henan province, and they have become known for their customer service. He's known as a good boss in a country where many workers are said to be feeling burned out at work.