Madrid-Guangzhou-Bangkok-Guangzhou-Madrid !

Hi !

I was planning to buy an intercontinental flight from madrid to guangzhou round trip,
is it ok if I stay in Guangzhou for less than 72 hours on my first way, after i fly to Bangkok,
after few days i will fly back to guangzhou, maybe stay less than 72 hrs again before flying to Madrid.
Is that ok ?

Thank you !