can canadian passport get visa on shenzen airport on arrival

Hi, it is easy for you to get a Shenzhen visa if you visit Shenzhen via Hong Kong and cross the Shenzhen border. But if you take flight, the airline may not let you board the flight at your departure port if you do not have a visa. So, if you have already booked the flight ticket, you can contact them or just apply for a Chinese visa in advance before visit.