Visa Limit 144 hours

I have travelled to China many times before on business and I see this new law effective Jan 2016.
I think I am on the cusp of the limit but I see that there is a note here that states, " The layover time should be limited to 144 hours. However, the 144-hour free stay period does not start until 00:00 of the day following passengers’ arrival. So actually, the allowed time to stay is a little bit longer than 144 hours.".
I arrive on a Sat at 5:30 PM flight and am leaving to Korea for 2 days on the following Sat at 8: am. I need to get a visa? or am I okay?