【海航允许携带宠物进入客舱，你赞成吗？】Hainan Airlines announced its in-cabin pet policy on Friday with several requirements, according to Beijing Youth Daily. The new policy allows two pets to fly with passengers on one plane, while each passenger can only bring one pet. Meanwhile, the pet and its carry-on case, which has a size standard, cannot weigh over 5 kilograms. Travelers need to apply for the service in advance and show proof of the pets’ health. The airline will charge a service fee of 800 yuan (125 US dollars) each way. Currently, the airline only allows the service in nine Chinese cities.