First of all, you need to find a manufacturer that makes food packaging bags, communicate with them about your needs and requirements, and what information to provide, such as some information about the company's products. These companies generally do not want to accept orders because they have small quantities. You have to tell them that your next step will be large, and you can cooperate with them for a long time in the future. You can control the scale, and then ask them to make a sample for you to see, and then you will decide whether to place an order. The process is almost like this.

Hope it helps.

Thank you for your help. Do they provide packaging? Or should I find a separate packaging company? What I want is a heat-sealed packaging, like a seasoning packet. Packaging I don’t understand this at all, please tell me more

Generally manufacturers will not provide packaging, and even if there is packaging, there is no way to guarantee the quality. If you have a large quantity, it is best to buy a packaging machine yourself