canada – A Chinese citizen, Canadian permanent resident visiting Taiwan from China, is Hong Kong the only way?

My mother is a permanent resident of Canada and a Chinese citizen. She booked a plane ticket to China. If she obtains a visa on her Chinese passport from the Taiwanese consulate in Toronto, then flies to China and visits Taiwan (for tourism purposes) before returning to Canada, goes through Hong Kong International Airport practically his only option to accomplish this? In a certain context, this visitor visa to Taiwan is only open to Chinese citizens with work permit, study permit, long-term residence visa or permanent resident status in Hong Kong, Macao or overseas. It also appears that Chinese citizens are not allowed to travel from China to Taiwan unless they travel as a tourist group from August 1, 2019.