2 long layovers

Hi
I have two long layovers in China on my way to Sri Lanka from Vancouver Canada. My first layover in in Beijing for16 hours were I will be traveling to Hilton Benji airport hotel and staying there for my first layover, l then fly to Chengdu and have a 8 hour layover but wont be leaving the airport. My layovers combined is 24hr ( if my flights are not delayed) will I need a 72 hour or will I be ok under the 24 transit free ?

Thank you.