Chains such as KFC, McDonald's and Pizza Hut are setting a new standard of customer service, using strict employee training and constant monitoring to ensure the friendliness of frontline staff.

肯德基、麦当劳和必胜客等连锁店正在制定新的客户服务标准，采用严格的员工培训和持续监控，以确保一线员工的友好服务态度。