SHANGHAI, Feb 1 (Reuters) - China reported 42 new mainland COVID-19 cases on Jan. 31, down sharply from 92 cases a day earlier, the national health authority said on Monday.

The National Health Commission said in a statement that 33 of the new cases were locally transmitted infections, down from 73 a day earlier. The number of asymptomatic infections, which China does not classify as confirmed cases, also fell to 16 from 19 a day earlier.

The total number of confirmed mainland COVID-19 infections to date now stands at 89,564, while the death toll remained unchanged at 4,636. (Reporting by Jing Wang and David Stanway, writing by Se Young Lee; Editing by Himani Sarkar)