The position of gamma-ray emitting region is still an open and controversial issue in the researches of blazars. The blazar zone is commonly assumed to be located inside the broad-line region at some hundreds of Schwartzschild radii from the central black hole. Recent observation in the Very-High-Energy (VHE, E>100 GeV) range with the MAGIC Cherenkov telescopes, contemporaneous to multi-wave length observations from radio to high-energy gamma-rays challe