There are many domestic island tourism routes, and the following are some of the more classic routes: 1. Hainan Sanya route: Sanya is a famous domestic island tourist destination, with beautiful beaches, tropical rainforests, hot springs and other attractions, suitable for family travel and vacation.

Sanya’s duty-free shops are also a highlight for tourists.

2. Hainan Wuzhishan Route: Wuzhishan is a mountain city in Hainan with unique natural and cultural landscapes, such as Wuzhishan National Forest Park, Haikou Volcano Group and China Tropical Agriculture Expo Park.

3. Gulangyu Island Route in Xiamen, Fujian: Gulangyu Island in Xiamen is a famous island cultural tourist attraction in China, with unique European-style architecture, beautiful beaches and romantic atmosphere.

Visitors can appreciate the rich history and culture.

4. Putuo Mountain Route in Zhoushan, Zhejiang: Mount Putuo is one of the four famous Buddhist mountains in China and is known as the "Holy Land on the Sea".

Visitors can experience Buddhist culture and enjoy beautiful sea and mountain views here.

5. Guangdong Zhanjiang Wanshan Islands Route: Zhanjiang Wanshan Islands is one of the largest island groups in China, with unique natural and cultural landscapes, such as Dajiao Bay, Nanhai Guanyin, Paradise Bay, etc.

6. Hainan Qionghai Coconut Grove Coast Road: Qionghai Coconut Grove Coast is one of the most beautiful coasts in China, with beautiful beaches, clear water and unique natural landscapes.

The above are some of the more classic domestic island travel routes. Tourists can choose the travel route that suits them according to their own preferences and time.