28 episodes.
1. The kissing scene between Qiao Changjun and Han Bing appeared in episode 28. At that time, the two were trapped in a hut during an operation. In order to avoid the enemy's pursuit, they pretended to be a couple. Hugging and kissing each other, this scene further developed the relationship between the two.
2. Special Train No. 1 is a spy war drama released in 2012. It has 34 episodes.