GZ_BJ_SP

i have a flight from guangzhou- beijing- sao paulo.. but I'm singapore right now i bought i flight singapore to guangzhou in the same day in the morning… i will wait in GZ airport 8 hours, but i need to recheck my luggage.. do i need to do a transit visa here in singapore? or i can just show the immigration my ticketS?

my stop in beijing is just 1 hour and a halt, since is direct flight i don't leave the transit area…