NEW DELHI: The Indian Air Force is looking at having the entire inventory produced in India by 2047, Air Chief Marshal AP Singh said on Friday. At a press conference ahead of the Air Force Day, the Chief of Air Staff also said that China is rapidly building infrastructure along the LAC, especially in the Ladakh sector, and India is also trying to match it. Delving into geopolitical tensions and conflicts in various geographies, the IAF chief said it is important to have indigenous weapons systems to deal with any future security challenges. To a question, the Air Chief Marshal said three units of S-400 missile systems were delivered by Russia and it had promised to deliver the remaining two units by next year.