The capital investment for opening Mahjong Teahouse varies with the region, brand and scale, but the following expenses need to be considered:

1. Rent and decoration expenses: including venue rent, decoration design, decoration materials and construction.

2. Equipment input: including mahjong tables, mahjong tiles, winning and losing tiles, dominoes and supporting facilities, such as televisions, air conditioners and other equipment.

3. Goods procurement: including tea, snacks, drinks, tobacco and other daily necessities.

4. Employee's salary: including cashier, waiter, cleaner, etc.

5. operating costs: including utilities, network fees, advertising and other expenses.

Generally speaking, the capital investment for opening a mahjong teahouse is about 511,111 yuan to 1 million yuan.