Hello Lacie: I think the greatest need, and particularly so for Chinese students, is to learn to pronounce the sounds of the English Language, prior to working with what the words mean.
Your schools has perhaps taught you by a method which eventually cripples your speaking ability.
Also, the ability of students to think in English is a gradual process which can only be brought about with programming your brain, memory, and even your body with the sounds of the language. After you do this, you can learn how to "think" in English, which is a logical language.
Start with Nursery Rhymes and after that, move on to simple songs. Soon, you will be able to speak with greater ease and spontaneity.
Beyond that, you need guided instruction which informs you as to what "core vocabulary" is.
It is a mistake to try to use all of the English vocabulary to speak with, write with, and think with. You need to learn a "core vocabulary" of vitally important words for communication.
In short, there are many words in English that are a waste of time for anyone.
Songs are of benefit as study materials because songs are "conversational". They employ common phrases used in Spoken English. When you become familiar with the simple phrases which appear in English Songs, you will be able to speak with ease and confidence.
You should not have to "think" about what you want to say. Speech should come easily for you. Message me if you want more information.