When was Yan 'an Film Studio established?

Yan 'an Film Studio was established in July 1946. Chen Boer, Ling Zifeng, Yi Ming, Jia Jia, Li Bo and other well-known artists gathered together, and with commendable entrepreneurial spirit, they started shooting the feature film "Working Heroes in Border Areas" with only 1 hand-held camera, 4 1 10,000 watt mercury lamps and 20,000 meters of film. Ling Zifeng, Cheng Mo and others. Go deep into the first line to shoot the film "Defending Yan 'an and Defending the Shaanxi-Gansu-Ningxia Border Region" with great historical value, and provide material for the documentary "Red Flag Rolling West Wind" and "Give Yan 'an Back to Me".