Extend your vocabulary? The obvious would be to suggest further reading. Find ways to appropriate new words you find, say for example a learning diary or notepad. When I was learning Spanish I would underline words I didn't understand and try to check their meaning later and if it was a word I could use put it in one of those A-Z address books to memorise. Also think about investing in a good thesaurus and reading the bilingual story books so you can cross reference words you already know in Chinese.