Should parents smack or spank their child?

Thy,who's my neighborhood,is just 8 years old. Yesterday,she came to my house and said to me that her mother gave her a spank because she climed the tree. I thought that was just a mischievous action of a playful kid so I don't think parents should smack or spank their child when their child do something wrong.
More than 90 percent parents in Viet Nam said that they had smacked their children.They though that was the good way to teach child but thay really didn't know doing like that will be a bad influence to physical development and mental development of the child if we ubuse.
First, children is in state of developing so the body is not complete. When you smack them it means you will hurt them and it'll be bad effect to their health, they can get sick or they 'll be weaker than normal child. Second, children always want to discovery new things. But sometimes they explore in wrong ways. Therefore, parents show them the right ways by using physical punishment.Maybe it will make kid scare and they don't do like that again. But some kids may too scared with parent's smacking or spanking so that they don't dare to explore any thing. Inaddition, it can be made a wall between parents and child.Child think that how thay can talk to who didn't want to listen to them. And the misunderstanding will accumulate day by day. the relationship will be worse and worse.
Morever, almost parents think smacking or spanking is just very usual and can be not a worse impact to child but in fact this really can becomme a cause of misbehaviours of child in the future.The mind of children is the same as a new paper and parents is the lesson for kid to learn and write what they learn on it.Children learn attitudes and bahaviours by imitating parents' action.They might think that their parents are models and always right so kid observe and try to do follow them. And even when kids see their parents used physical punishment to them, they can form a thinking that using violence is the quick way to solve problems. After that they do that to their friends or someone eles who is smaller and weaker than them. And if they still keep thinking like that day by day, they will become a crime oneday. That is not what parents want for their child.
Children is the future of the country. So educating them is very important. However we need to know what education is good and what is not good. We should not abuse your strong power to teach child and we just use physical punishment in some cases that are really really neccesary . But in my opinion, I think the truly good way to educate children is guide gentle, listen to them and really want to understand them by you heart.