What time is the earliest train from Jiangdu Bus Station to Zhenjiang High-speed Railway Station?

The earliest departure is at 6:30, and its timetable is 6:30---17:40 (one departure takes about 30 minutes).

1. Bus routes:

(1) Jiangdu No. 9 → No. 99 evening shift → Yangzhen Tourist Line → No. 17 (3 hours and 2 minutes | 55.67 kilometers)

(2) Jiangdu No. 9 → No. 99 night shift → No. 27 → Yangzhen Tourist Line → No. 17 (3 hours and 3 minutes | 53.8 kilometers)

(3) Jiangdu No. 9 → 99 Road night shift → No. 18 night shift → Yangzhen Tourist Line → No. 17 (3 hours and 4 minutes | 53.98 kilometers)

(4) Jiangdu No. 9 → No. 99 late shift → No. 60 late shift → Yang Town tourist line → No. 17 (3 hours and 9 minutes | 53.3 kilometers)