24-hour visa free transit at Shenzhen Airport

I'll be travelling from Seoul to Sydney with 1 stop at Bao'an airport for 8 hours. I don't want to leave the airport, is the 24-hour visa free transit available at Bao'an Airport? I don't have time to apply for a Chinese visa now. Bao'an airport used to not apply the 24-hour visa free transit, what about in 2019? Is it available now?