1: Mastering over 5000 commonly-used Chinese characters.
2: Being able to express your views under complicated and interactive circumstances.
3: Being able to carry out daily conversations in an easy way, with correct grammar and syntax in long and complicated sentences.
4: Being able to grab the basic meanings when it comes to the fields or relatively complicated topics that you are unfamiliar with, for which you might not be able to join the debate actively.
5: Being able to carry out complicated activities such as giving speeches in Chinese, writing formal letters and doing business activities in China, etc.