Mainland China reported dwindling new infections on Wednesday in a global coronavirus pandemic, and started to publish the daily change in cases that are free of symptoms, although the latter could complicate the picture of trends in the disease.

Almost all of Tuesday’s 36 new cases involved arrivals from overseas, the National Health Commission said, down from 48 a day earlier, and taking the tally of infections to 81,554.

But that figure excludes 130 new sufferers of the highly contagious disease who do not show symptoms, statistics from the health authority showed.