Resumption of postal services to Argentina, Bolivia, Canada, Iceland, San Marino, South Africa and Vatican
https://www.hongkongpost.hk/en/about_us/whats_new/press_release/index_id_938.html

Hongkong Post announced today (December 15) that with the gradual scaling up of air and sea freight capacity,
airmail services to Argentina, Bolivia, Canada, Iceland, San Marino and the Vatican, as well as surface mail services to South Africa, will resume from tomorrow (December 16).

Weight limit of mail items adjusted from 2 kilograms to 10kg for Speedpost to Canada