I am travelling from Kathmandu Nepal to Manila via Guangzhou Airport.

Currently, there is only one terminal building at CAN.
For international to international transfer, the procedures are the following:
Flight Arrival
Inspection & Quarantine
Transfer Procedure: go to helpdesk or under the direct by sign to find your transfer counter.
Waiting & Boarding: find your boarding gate under the direct by FIDS/sign and wait.
You can easily find the boarding gate because there are many English signs at the airport. Don't worry.