Transit Visa

Hello,

I am a Philippine passport holder planning to visit the Philippines. My itinerary includes the following flight segments:

Germany → Budapest (3-hour layover)
Budapest → Guangzhou (2-hour 40-minute layover)
Guangzhou → Philippines
I have two questions regarding this trip:

Will I need a transit visa for my layover in Guangzhou, given that all flights are self-transfers?
Is a 2-hour 40-minute layover sufficient for a self-transfer without checked luggage?
Thank you in advance for your assistance.