1. Office space: including employees in various companies, government agencies, institutions and other office environments, such as office staff, administrative staff, civilian staff, etc.

2. Commercial premises: including employees in various commercial organizations, retail stores, supermarkets, department stores and other commercial environments, such as salesmen, shop assistants, cashiers, etc.

3. Service places: including employees in various service industries such as catering, hotels, tourism and entertainment, such as restaurant waiters, hotel receptionists, tour guides and performers.