I want to know the answer to the following question:
When was Jinrong a police chief in this area?
All the background I'm provided with is that "An illustrative example of official involvement in organized crime can be found from 1920s and 1930s Shanghai, where Huang Jinrong was a police chief in the French concession, while simultaneously being a gang boss and co-operating with Du Yuesheng, the local gang ringleader.". Is that enough to answer the question?
Answer: yes