Context: In 2015, the system began its transition towards global coverage with the first launch of a new-generation of satellites, and the 17th one within the new system.

Question: When did the BeiDou system begin transitioning to global coverage?
Answer: 2015

Question: How did the BeiDou system begin transitioning to global coverage?
Answer: with the first launch of a new-generation of satellites

Question: During what year did the system begin transformation towards serving China only?
Answer: Unanswerable

Question: What did the system first launch in 2013?
Answer: Unanswerable

Question: In 2007, the system began transforming towards providing what type of coverage?
Answer: Unanswerable

Question: The system began its transition towards national coverage during which year?
Answer: Unanswerable