I have a difficult time envisioning Canada making a useful contribution to the "land war in Asia" part of a war against China. I also have difficulty envisioning the air/naval part of the war going deeply into the Pacific, from China's PoV, except as a convoy war.
The Ukraine war reminds me that - in crude terms - if our "come as you are" priors produce a force that can sustain operations for N months and it takes us M months to usefully mobilize where N < M, then a prospective foe just needs to design a force that can sustain operations for P months where N < P < M.