I want to know the answer to the following question:
When did the BeiDou-2 begin construction?
All the background I'm provided with is that "The second generation of the system, officially called the BeiDou Navigation Satellite System (BDS) and also known as COMPASS or BeiDou-2, will be a global satellite navigation system consisting of 35 satellites, and is under construction as of January 2015[update].". Is that enough to answer the question?
Answer: yes