First of all, there must be a venue, which is big enough. Bars, service reception, business cards, publicity, etc. You have to have a business license if you set it yourself! Then taekwondo clothes. Then there is the training ground. The floor should be soft and not too fancy. Also, the air in the Taoist temple is good, so you can buy bamboo charcoal to purify the air. Then air conditioning, summer heat, water dispenser! But don't set air conditioning in the playground. And mirrors. There must be mirrors around the training ground. Finally, there are equipment, foot targets, sandbags, protective gear and railings for leg press in the venue. There are also lounges, dressing rooms, bathrooms and the like. Finally, you're not going to open a taekwondo gym, are you?