Braised vegetables and cold dishes shops abound. You can go to the store as an apprentice without tuition, but it is impossible for others to try their best to teach you. After all, we will be competitors in the future, and we can also learn from others and see for ourselves. Of course, you'd better go to a brand store to learn technology. Isn't that what everyone does now? I know a good brand of Sichuan ginseng bangbangji, which has a good reputation and is taught by famous chefs. You can check the cost online. It shouldn't be very expensive. I hope I can help you.