The number spiked today because the test they were doing before reportedly have some false negatives and they could only do so many tests everyday. So starting yesterday clinical diagnosis using CT scans are being counted
Edit: 13332/14840 confirmed cases and 135/242 confirmed deaths are categorized as ‘clinical diagnosis’
Edit 2: Clinical diagnosis cases have only been reported since Feb 11, and today is the first time they are counted towards the confirmed cases. On Feb 11, it was reported there were 4890 new clinical diagnosis cases and 10567 total clinical diagnosis cases. On Feb 12, it was reported that were 13332 total clinical diagnosis cases. So applying the math, there were 2765 new clinical diagnosis cases on Feb 12 alone.