Adult tigers generally weigh more than 180kg. Song Wu alone can't catch the tiger at once.
Tiger body is 80% developed muscle group, and its powerful forelimbs can produce 200 kilograms of strength when taking pictures with one hand, which is enough to break human bones with one wave. A tiger's claws are as big as someone's head and can do more harm. If Song Wu fights with the tiger, he is likely to be severely shattered by the tiger before starting work.
Tigers can run at a speed of 45 kilometers per hour, and the limit record of human 100 meter sprint is 9.86 seconds of Bolt. If Bolt is allowed to compete with the tiger in the 100 meter sprint, the fastest 100 meter sprint can be completed in about 10 second, while the tiger only needs 4 seconds. In other words, if Song Wu meets a tiger, it is impossible to outrun the tiger just by running away.
Some people may say, I can climb trees or swim. In fact, tigers are born to climb trees. In summer, tigers often go swimming to enjoy the cool.
There are four sharp canine teeth in the tiger's mouth, which can be as long as 10 cm, and the claws on its hands and feet can be as long as 7 cm. Figuratively speaking, it is equivalent to a tiger with four knives in its mouth, 10 knives in its hands and 10 knives in its feet. It is equal to the tiger carrying 24 sharp knives. Really "24 knives".
The tiger's bite force is so great that people doubt life. The Siberian tiger can produce 470 kilograms of strength when bitten. Such a force can easily penetrate the skin of any animal and reach the muscle layer and internal organs. If Song Wu is accidentally bitten in the process of killing tigers, then basically that part will be abolished, or the whole person will be abolished.
A tiger has a very special tongue in its mouth. Under the microscope, you can see that the surface of the tiger's tongue is covered with dense barbs. These barbs are extremely sharp and help the tiger chew all the meat to the maximum when eating. If a person is accidentally licked by the tiger's tongue, his skin will be raw.
Tigers have extremely thick skin and fat layers, which help them resist the cold in winter. General physical attacks are "invulnerable" to tigers. Song Wu was alone with his bare hands. Even if his hand was broken, it would only tickle the tiger.
Tigers are not only powerful, but also have first-class viability. Experimental data show that tigers are still fighting even if they don't eat for a week. If you don't eat for two weeks, the tiger will have physical exhaustion and mild collapse; You will die if you don't eat for two and a half weeks. Tigers are twice as hungry as humans. And in a state of hunger, it can still maintain normal lethality.
To sum up, Song Wu's killing tigers is purely a fiction by the author of Water Margin. If in reality, humans meet a tiger with their bare hands, the chances of survival are very low, unless the tiger is full and doesn't want to touch you.