The difference between 138 and 168 may refer to two different products, models or services. Since the specific information is unknown, a definite answer cannot be given. Generally speaking, numerical differences may be reflected in performance, functionality, configuration, price, etc.
As for the difference between getting on the boat at Hongyadong and getting on the boat at Chaotianmen, it mainly depends on the geographical location and tour experience:
Geographical Location:
- Hongya Cave: Located in Yuzhong District, Chongqing, it is a famous scenic spot on the Yangtze River, famous for its stilted buildings and night scenery.
- Chaotianmen: Located at the intersection of the Yangtze River and Jialing River in Yuzhong District, Chongqing, it is an ancient wharf in Chongqing and an important starting point for touring the Yangtze River.
- Hongya Cave: Located in Yuzhong District, Chongqing, it is a famous scenic spot on the Yangtze River, famous for its stilted buildings and night scenery.
Tour experience:
- Boarding at Hongyadong: Tourists can take a cruise at the boarding point near Hongyadong, enjoy the scenery on both sides of the Yangtze River, and experience Chongqing’s river culture.
- Get on the boat at Chaotianmen: Tourists can get on the boat at Chaotianmen Pier and enjoy the scenery on both sides of the Yangtze River. As Chaotianmen is a historical landmark of Chongqing, tourists can also visit related historical and cultural relics near the pier.
- Boarding at Hongyadong: Tourists can take a cruise at the boarding point near Hongyadong, enjoy the scenery on both sides of the Yangtze River, and experience Chongqing’s river culture.
In general, the experience of boarding the boat at the two places is similar, but the Hongyadong boat trip may focus more on the night view and stilted building culture, while the Chaotianmen boat trip focuses more on the historical and cultural experience.