As a documentary filmmaker, Wang Taika's physical fitness could reach the level of a survival expert. Otherwise, it would be impossible for him to have visited so many dangerous places and survived safely. So, he knows or has heard of almost all the well-known survival experts in China.,“Hello everyone! I’m Gongsun Hu, a survival expert. You can call me Tiger Brother!” the burly man said to the camera in a dramatic tone: “I have a strict temper and won't relax my requirements because you are celebrities. Because that would be irresponsible to your lives! This is deep in the mountains, a very dangerous primeval jungle. There might be some crises inside, so for your own safety, you must listen!”,"Okay, now let's form groups! Two people per group. Because this is the first period, I won't let you guys act alone. Instead, I'll lead you all to explore the jungle!" Gongsun Hu, the expert, said: "In the wild, the most important thing is to find water sources. Let's head towards the mountains and see if we can find any."。