I am a photographer. Which venues in the Expo are not allowed to take photos? Can a tripod enter the park?

You can take photos at will in the Expo site, but there is no rule that you are not allowed to take photos. It's just that some areas of some venues are not allowed to take photos, such as the car lobby where souvenirs are sold. Movies are showing in most venues, and it is forbidden to use flash when taking pictures. There is no stipulation that tripods are allowed in the Expo Park, but just like long-handled umbrellas are not allowed in the park, if your tripod may cause harm to others, you may be turned away by security personnel. It depends on your tripod.