Personally, I think the answer is: G1065 Beijing South - Qingdao

  1. First,梳理图中关键信息: Note: "梳理图中关键信息" is translated as "梳理" is a Chinese term that doesn't have a direct English equivalent in this context. It means to organize or sort out the key information in the diagram. However, for the sake of authenticity, I am keeping the original Chinese term. If you prefer a fully translated version, it would be: 1. First, organize the key information in the diagram:

（1）The opposite train is terminating at Shanghai Hongqiao, the current time is a four-digit number (i.e., after 10:00).

(2) The exit sign on the distant platform reads “7 (West)”, and the reflection of the platform where the nearby train is also shows “7 (West)”

  (3) The station has a distinctive roof.

  (4) The reflection inside the car shows the interior of the train as follows.

2. From this, it is determined that the station is Beijing South Station, so the opposite train is the starting train. Noticing that some of the seats in the car have not been turned around, it should be a turnaround train that has not yet taken on passengers.

3. The west exit 7 of Beijing South Station serves platforms 8-11. The photographer's perspective is towards the west, indicating that the photographer is on the train docked at platform 7, corresponding to ticket gates 7A/8A.

4. The train on the opposite track should be the long formation CRH380CL (although 380BL might also be possible, but it was ruled out in the later stages)

5、For the train service number, check 12306, and rule out G107/109/111/117 by departure time, and rule out G135/139/147 by platform location;

6. Only G125 and G129 are checking tickets at platforms 8/9, the stopover platform times are 10:22-10:48; 10:30-11:18 respectively

7. Since the photographer only captured one set of trains on the platform, it rules out the time when two pairs of trains were on the opposite platform. The photographer could only have boarded the trains that stopped at Platform 7 between 10:22-10:30 and 10:48-11:18

8. Find the train that was checked at the ticket gate on 6/7, only G1065 meets the criteria, with the model being CRH380CL, and the interior is consistent with the image.

9. The shooting time should be between 10:25-10:30, at this time the preceding train G2572 of G129 has not arrived at the station, and the preceding train of G125 has already arrived and is preparing to depart for Shanghai Hongqiao Station as train G125