you can explain how having the public (specifically the demos using the greek idea of democracy) have input in government policy within the Chinese system. i only know about cuba's system tho which is, in my opinion, the most democratic one there is.
do the public in China have the ability to recall their delegates?
do their delegates in the national assembly bring drafts of bills to them for community input at public meetings?
do they have referendums for major changes to laws and the constitution?
what portion of the delegates in the highest levels are people who aren't career politicians?
etc. etc.
these are all things Cuba has but I don't know if China has them. China might not be a democracy by any reasonable definition and even if you support its ruling party you should be open to that possibility while researching.
a major thing you might come across is that Chinese citizens will say that democracy means a government that does what the people want. it's outcomes based. in the west we often focus entirely on process for defining democracy. but some are very restricted and insist that a democracy is a government made up of regular people, who are chosen by regular people, and who act for regular people (of, by, and for the people). it seems that in liberal circles they care more about the "by" and in China they care about the "for" and in ancient greece they cared about the "of".