Which methods of selecting officials led to the best leaders for China

I think the method of the civil service exam was the best way to pick leaders because it was the most fair way to gain social mobility even though it was based on Confucianism.
Other Ways:
- Chose aristocrats
-Chose foreigners

The  pan-african movement  was an "emotional, cultural, psychological and ideological  movement  that began among the  african  dispora in the western hemisphere, for a closer  purpose, so that  african  people could feel secure, attain political, economic as well as psychological power visa vis other races or world regions" .