1. Wear a gas mask and grow a sanitary beard.
The moustache under the Japanese nose in World War II is actually a simplified version of Hu. Because more than two thousand years ago, many terracotta warriors and horses with Hu can be found in the unearthed Qin terracotta warriors and horses. You should know that the Qin Terracotta Warriors and Horses are realistic and completely imitated by real people.
Only in the historical development of later generations, Hu appeared variation. That is, a lot of poisonous gas was used in World War I, and soldiers' beards often needed cleaning. A large area of beards will affect the wearing of gas masks, and their beards will be polluted by toxic molecules. Therefore, for the sake of hygiene and safety, soldiers in World War I shaved off their beards, even if they had moustaches on their lips. But to show men? Hairy mouth, firm? Trim the beard on the lips into a reduced moustache. Health Hu was born.
2, electric shaving, fast and efficient
But with the arrival of 1939, the world's first practical electric shaver was invented and mass-produced. Therefore, people no longer have to work hard, holding a manual razor, boiling water and scraping gel. Shave off the messy beard all over the cheeks and upper lip. Even a clockwork mechanical shaver can clean the beard very easily.
The revolutionary change of shaver has also led to the change of people's attitude towards beard, and the bearded man has become an alternative aesthetic. White flour? The afterlife? It is a symbol of cleanliness, spirit and vitality. Why do you want to grow a moustache?
3, aesthetic changes, "chicken ribs" beard
Therefore, under the high efficiency of electric shaver, the sanitary beard, which once represented hygiene, becomes something that will be shaved off when it shivers, but it becomes a deliberate trick. In addition, human beings have entered the electrical age, and aesthetics has become simple because of industry, so sanitary beards have become abandoned like chicken ribs.