Compatibility summary
Your Philippines plug may fit in China outlets, as both use at least one common plug type.
Plug comparison
Philippines plug types: A B C
China plug types: A C I
Both countries share at least one plug type (A B C and A C I), so some plugs may work without an adapter. Check your appliance.
Voltage comparison
Philippines: 220V, 60Hz
China: 220V, 50Hz
Voltage difference is within a range many devices tolerate; check your appliance label.