College realistic painting school

Before photography appeared, painting was mainly realistic, so the academic school was actually the base camp of realism. Now the academic school is the old-fashioned realistic training method. When photography appeared in the 1850 s, the training of realism became a big problem, because no matter how vivid your description is, it is still not as accurate as photos, not to mention photos are much faster. The education center of the college was originally a training of realistic techniques, but suddenly faced with such a situation, I don't know how to react. Around 1860s, private studios of various painters appeared in Paris, challenging the academic school. The emergence of impressionism is actually a challenge to the academic school. Originally, the "salon" with official color was still dominated by academic school, but Courbet set up a shed outside the salon and set up a "loser salon", which stole the limelight from the salon, and the academic school further declined. When Xu Beihong came to study abroad, the academic school was basically at the end of the road. At this time, it is puzzling that he chose academic study and brought it back to China as the only system promotion.