No need to go to Saipan! Zhuhai's Dong'ao Island is also very attractive.

Zhuhai Dong'ao Island 2-Day 1-Night Tour Guide IV. Transportation: Xiangzhou Port (Zhuhai) RMB100 per person, 50 minutes Hengqin Port (Zhuhai) RMB70 per person, 40 minutes Shekou Port (Shenzhen) RMB160 per person, 70 minutes (free of charge for those under 6 years old or under 1.2 meters in height) It is recommended to purchase the round trip together and board the ship with a mainland China ID card. The main means of transportation on the island are electric cars and walking. Accommodation: Large hotels (Gree, Marriott) require battery cars to reach, but the hotels have free shuttle buses, and most B&Bs are located near the pier. If you have enough budget, it is recommended to choose a large hotel. Gree Hotel has an infinity pool, which is great for taking photos and has more complete supporting facilities. [Overall experience] You don’t need a Hong Kong and Macau Pass, you can take a luxury sightseeing cruise, experience the panoramic view on the deck, and watch the Hong Kong-Zhuhai-Macao Bridge up close at sea. Although the consumption on the island is slightly higher, it is still worth staying for one night and playing for two days. The scenery is beautiful, and you can also experience sea activities and take many beautiful photos.