In the cave, director Han Junqing and director Qu are in a hurry. There is no signal on the mobile phone inside and they can't meet the troops outside. They have been looking for the door for a long time and have no mechanism to open it. I don't know that the mechanism of others is unidirectional. Generally, the door is open, and only in this case will they close it.

besides, usually in this cave, it's impossible for both doors to be locked at the same time. Even if they are locked, someone will soon find out. However, this time, they are deliberately trying to trap these policemen in...