Friend, my brother wants to work as a cashier in a bar in Beijing for two years, with 4000 yuan a month, including food and accommodation, 3000 yuan a month for his family, and 1000 for himself.

You have a good brother. Tell him not to touch pornography and drugs. In addition, let him keep more living expenses and take care of himself when he is away. What you learn in the bar may not be bad, but it depends on your own concentration. In the bar, he can learn bartending or something, and later he can be a bartender (a very good career). Your brother can still keep the money he gave home. If the conditions at home are not good, you can save money and open up new sources, and work harder yourself.