In fact, this is not the first time that Youku has seen this situation. On some special days, such as the 7-day festival of Tianjin Port's 8. 12 explosion, Youku experienced a similar situation. Similarly, when a special person dies, Baidu will also display the relevant information of the deceased in black and white.
As for how the APP suddenly turns gray, the vegetable dog said that it is not very difficult to operate only by modifying CSS properties in the background of the software, especially the webpage class is simpler (digression).
As for why the software is black and white on special festivals, I personally think it is a warning to the younger generation. On the one hand, it is to comfort the deceased, on the other hand, it is to alert the people. Tell everyone with simple but firm behavior: historical tragedies must not be repeated, and nothing can stop the historical pace of the great rejuvenation of the Chinese nation.
In addition, suddenly changing the presentation mode of the interface will make students who don't know this history know more about history, which is also an alternative way of popular science.
In short, the dead have passed away and the living have made progress. As good children in the new era, what we can do is not only remember the history, but more importantly, add luster to the development of China with our own efforts ~