The CBSA has updated Customs Notice 25-05 with a pdf copy of Schedules 1 & 2.
Customs Notice 25-05: China Surtax Remission Order https://www.cbsa-asfc.gc.ca/publications/cn-ad/cn25-05-eng.html

The Schedules to the China Surtax Remission Order are expected to be published on February 12, 2025, in the Gazette Part II, found here: https://gazette.gc.ca/rp-pr/publications-eng.html .