1. Railway route planning: There may be no through train in the railway route planning between Jiangyin Station and hangzhou east railway station, or it cannot pass directly due to the geographical conditions between the lines.
2. Analysis of transportation demand: After comprehensively analyzing the transportation demand of different lines and stations, the railway department will arrange the train operation plan reasonably. It is also possible that there is no through train to hangzhou east railway station via Jiangyin Station due to the consideration of transportation demand.
3. Limitation of station facilities and load capacity: The facilities and load capacity of Jiangyin Station may not be enough to support the through train operation. In order to ensure passenger safety and transportation efficiency, the railway department may impose temporary or long-term restrictions according to the station facilities and load capacity.
The above are some possible reasons, and the actual reasons may be affected by other factors. If you need to know more specific information, it is recommended to consult the relevant railway departments or consult relevant official materials.