Searching Seoul - Movie

The movie Searching Seoul is about half koreans spend a summer camp in Korea. The genre is comedy. At the beginning of the movie, I thought it is lame comedy. The characters seemed too much, a little over reacting. The purpose of summer camp is to learn Korea cultures. But the movie was showing more of their deviations. They break rules to have fun boys and girls together. I wonder why they come to summer camp in Korea. Most of them are not interested in learning Korea culture. They travel meaningful places, learn Korean words, and Taegwondo but those are short scene. The movie is focusing on the relationships and family. They have a common. Their parents had hard time back then so they had to move abroad or run away. They described Korean men as violent and bad. What was the point of the writer?
The movie shows a girl adopted when she was four. She meets her biological mother in Korea. They can’t understand each other. But the girl starts to talk in English and somehow her mother begins to cry. It shows a strong bond between a birth mother and her daughter. It makes me wonder if it is really possible. The daughter has raised until she is four. She barely can remember her birth mother. After several years, she meets her mother. There is no memory in common, the daughter can’t recognize her mother. I think it would be seeing a stranger. It would be even more awkward because it looks like a strange woman says that I am your mother.
I think it could be nice for the mother. She can remember her child for sure and she would have missed her daughter all the time. What is the reason for the daughter to meet her mother? She has good family. New parents raised her well and she would have much more memories with her new parents. If I would have been adopted, I would not looking for my birth parents. I think giving a birth doesn’t make someone mother. Parents should be responsible for their child. Once they abandon their child, they don’t have right to meet their child again. I think I can think of few exceptions but in this movie, the mother wasn't my exception. She had a family and ten years old daughter. She wanted to hide her daughter from her current family. But still the daughter wanted to meet her mother again and had talks and time. Is there really a bond between mother and child?