Chinese airline Loong Air has started operations between Hong Kong and their hub in Hangzhou earlier in August 2022. As far as I know, this is the first time this airline has operated passenger flights into Hong Kong, and is one of the first new airlines to start flying to Hong Kong after aviation almost came to a halt due to Covis-19.
Loong Air operates this route with an Airbus A321 every Monday, Tuesday, Thursday, Friday and Sunday. So far they have not published a schedule after September 6th, so I am not sure if they will pull out already, but my guess is they will extend past this.
The flying time between Hong Kong and Hangzhou is about 2:40