I don't remember any special restrictions, but their program is more professional, and there are more food industry buyers on site, such as agents and some industry retailers, so I suggest you can go to the official website to learn more about it. Visitor pre-registration will also be opened in the near future, when you can pre-register on the registration can be, SIAL 2022 International Food Exhibition (Shanghai) will be held on May 18-20, 2022 in the Shanghai New International Expo Center, I heard that the 2022 exhibition is expected to attract more than 30 countries around the world, more than 4,500 exhibitors, more than 150,000 + professionals to come, the scale of the luxury, have the opportunity to participate in the must go see! The scale is very luxurious, so if you have the opportunity to participate, you must go and take a look!