1. You can take the bus to Chongqing first, then take the high-speed train from Chongqing North Station to Jiangjin. This way needs to transfer between bus and high-speed rail, and involves more bus lines and vehicles, and the overall travel time may be longer.
2. Another way is to take a bus directly from Kaizhou Central Bus Station to Jiangjin Bus Station, which is more direct, but it may take a little longer.
These two methods have their own advantages and disadvantages. You can choose the most suitable one according to your actual situation and travel needs. However, in order to obtain the most accurate travel information, it is recommended that you directly consult the relevant transportation agencies or bus service companies.