The greater the angle of bending the waist, the slower the speed, the more polite courtesy. So, service industries such as department stores teach people to go down slowly when greeting, stay for about a second, and then come up quickly. It is usually divided into five types depending on the angle. It is divided into mukrye, yakrye, ordinary, formal, and most polite, and generally, Yakrye (15 º), ordinary (30 º), and Jeongjungrye (45 º) are commonly used. Put your hands together or stick them on the side when greeting. However, do not spread your legs or hide your hands.
In Korea, there is a mixture of greeting methods that bend the head and waist without physical contact that has been done since the past, and greeting each other with one hand like a handshake. Even if you shake hands, the subordinate usually shakes hands with both hands, or slightly bends his waist and head, conscious of the hierarchy relationship. The superior usually shakes hands with one hand without such a thing, and generally does not do the act of bending his back or head.
In Korea, greetings from superiors and subordinates are closer to salutes, that is, rituals to distinguish and confirm upper and lower relationships in human relations, rather than the original meaning of greetings that clearly recognize each other and confirm their safety at the first meeting. If you're very close without class differences, you don't say hello at all or just do it roughly
Even the same classmates will be told, "Why don't you pretend to know me?" if they don't greet each other even when their eyes meet. Sometimes, if you pass by without seeing your friends or motives, it is easy to hear "Why are you ignoring me" as an anti-joke later, but strangely, there are people who only greet their seniors, saying that they do not have to say hello. Friends also care about greetings because greetings between friends are a kind of confirmation that they recognize the other person. And although it is rare, when we are busy with each other or when we don't care much, we greet each other roughly and just talk.
Generally, it is common for informal greetings to shake from side to side with one hand open or to just raise and lower one hand.
It is one of the most important and necessary things in Korean society, and it is enough to measure whether you have received a good family education by looking at how to observe a family meeting.