Sorry that I have to pour cold water on your hopes cassowary (and in my own romantic flights of fantasy I would delight in sharing them): but I do not believe that the time for the Chinese Communist Party to be wiped away has come yet. When I forecast that it would eventually go I was thinking (Asian style) in terms of centuries.
Trump's trade war will not bring it about!
Further, when the fall happens I would not bet on this continent-sized, multi-ethnic entity necessarily lapsing into a functioning democracy as though this were the most natural thing for a country long ruled by tyranny to do. History has seen too many cases where an old tyranny, once overthrown, has in the ensuing turmoil merely sired a newer and more efficient tyranny. Like the USSR replacing Czarist autocracy.
Taiwan does not set a clear precedent for what might come about on the mainland because on Taiwan they speak just one unifying language: I believe the Hakka dialect also spoken in neighbouring Fujien provence on the mainland?
Taiwan is NOT a multi-ethnic state but demonstrates the credentials of nationhood.
As you yourself once categorically stated in a memorable post in another thread; the Chinese are not one people - talking about Chinese is like talking about Europeans. They are a very diverse bunch. On Taiwan they speak one language while in mainland China they speak umpteen of them. Keeping China unified has always been a challenge for the imperial dynasties of yore without exception. The present day Chinese Communist Party has inherited that challenge - along with the structure of a multi-ethnic imperial state to bring it about.
Arguably, multi-party democracy works in Taiwan because the Taiwanese, dwelling on a compact island and speaking the same mother-tongue (not the same as the Mandarin spoken in Beijing and elsewhere in northeastern China) are sufficiently alike in their thinking to hold a broadly similar set of views and a shared allegiance. If multi-party democracy were tried out on the mainland it would more likely be divisive and propel the country into a new chaos - preceding the arrival of a new tyranny for imposed unity and order.