Conversation so far:
what geographic feature was in the german sphere of influence in China in 1911?
Shandong Peninsula, Qingdao was a geographic feature in the german sphere of influence in China in 1911.
how was the sphere of influence lost for Germany in Shandong?
As a consequence of the First World War, Germany lost Qingdao and its sphere of influence in Shandong.

Question: what happened after?
Self-contained rewrite: what happened after Germany lost Qingdao and its sphere of influence in Shandong?