what is your opinion on studying abord

It is extremely useful if you are learning the language and want to learn how people live in another country.However the difficulty of using another language to study will make the studying much more difficult,as well it will be difficult to adjust to the different culture,you need to be prepared for it.Most Chinese students I've talked to studying here in Melbourne often struggle with the language difference,and a lack of understanding of the local culture sometimes makes them feel that the locals are very rude.
I went to China to teach English (as I am not Chinese) and I loved the experience of learning about the different culture,eating the local food,and learning the local language.
Many Chinese study abroad however and find it difficult to make friendships with the locals,it depends on your personality.Often they end up just staying with Chinese where they feel safe.

study more hard

You cannot study anything except language and native custom.