It's hardly clear how this will help much. Vancouver has a population of about 600k people. According to the article, 10k houses are empty. This will, at best, increase the housing supply by 1.6%.
Meanwhile, Vancouver is extremely low density - 13k people/square mile, about 1/3 that of high-rise megacities like...Brooklyn.
Great work guys! Scapegoating a few rich Chinese people with second homes while ignoring the massive self-inflicted harm that locals do.