A group of Chinese-Australians are planning to rally on Saturday against Hong Kong’s pro-democracy protests, calling for a return of law and order in the city and an end to what they say are biased portrayals of China in Australia.In the latest sign of unrest in Hong Kong rippling overseas, the group will demonstrate in downtown Sydney to denounce what they say are riots that have challenged China’s sovereignty and prompted discrimination against them in Australia.The “Hong Kong No Riot” event…