Why did the Japanese invaders plunder cultural relics crazily after occupying Peiping?

Since 1937 Lugouqiao Incident, China and Japan have entered the stage of all-out war. Japanese invasion of China 14 years. During this 14 year, they not only plundered the population and killed innocent people, but also plundered countless historical relics. The humiliating history of modern China led to the loss of a large number of precious cultural relics in China overseas. Among the cultural relics plundered by foreign invaders in China, the cultural relics plundered by the Japanese army during the War of Resistance against Japanese Aggression period were the most amazing. Japan is a tiny place, and it will certainly not be soft when you see many treasures in China. But after Japan occupied Beijing, the things in the Forbidden City were intact. Why?

First, notice that there is no looting of the Forbidden City here, which does not mean that there is no looting. For example, in 1944, more than 0/0000 precious ancient books of the Forbidden City in Beijing were looted by the Japanese army. As we all know, before the Japanese army occupied Beijing, the Kuomintang organized a large number of manpower to move the cultural relics of the Forbidden City to the south. At first, these cultural relics were collected in Nanjing. Before the fall of Nanjing, they were all transported to Chongqing. Having said that, I understand that before the Japanese occupation of Beijing, the most precious cultural relics in the Forbidden City were transferred.

Second, the Japanese are arrogant, but they have no courage. Why do you say that? Because the Forbidden City is a symbol of Chinese civilization and the crystallization of China people's wisdom. It is sacred and solemn in the hearts of ordinary people, so if Japan openly plunders the Forbidden City, the Japanese will be in a very dangerous situation and it will be difficult to protect themselves. It is bound to be unanimously condemned by the whole country, which will further strengthen China's anti-Japanese determination. This is very bad for Japan. As a result, a series of uncontrollable events happened, which affected their plans.

Third, Japan was also under international pressure. During the Japanese invasion of China, the eyes of the whole world focused on 9.6 million square kilometers of land in China. The allied forces of Britain and France looted the Summer Palace, burned the Yuanmingyuan, and Eight-Nation Alliance destroyed the splendid ancient culture of China. The international community is disgusted with this. During the fall of Beijing, celebrities secretly protected the Forbidden City many times, and the condemnation was endless. As one of the Eight-Nation Alliance, Japan has a deep understanding, plus the full resistance of the people left behind in the Forbidden City.

Fourth, Japan is a country with many earthquakes and volcanoes, so the Japanese feel extremely unsafe. Japan has long had the idea of moving out. It occupied China and rebuilt the country with a city in China as the Japanese capital. In contrast, the Japanese army paid more attention to the military occupation of Beijing. At that time, the Japanese army arrogantly thought that China was all theirs, so why care about a mere Forbidden City?