Macau to Xiamen. Xiamen to Philippines

My flight will be on 23 December, from Macau to Xiamen and i have a lay over for 4hrs. And Xiamen to Philippines. Do i still need to apply for a visa even if i will not go out from the airport?

Hope you'll be able to help. Thank you so much! 🙏🏻🙏🏻🙏🏻