A Hainan Airlines Boeing 737-800, registration B-5579 performing flight HU-7380 from Sanya to Beijing (China), was climbing through about 8000 meters (FL260) out of Sanya when the right hand windshield developed cracks prompting the crew to stop the climb at 8100 meters (FL266). The crew decided to return to Sanya where the aircraft landed safely about 40 minutes after departure.
A replacement Boeing 737-800 registration B-5798 reached Beijing with a delay of about 4 hours.
The occurrence aircraft is still on the ground in Sanya about 10 hours after landing.
The cracked windshield: