Professor Chen Fadi, the winner of the second National Innovation Breakthrough Award and the president of Nanjing Agricultural University, has a similar saying: Innovation cannot be "behind closed doors" but must "look up and see the way".

Zhu's "The Doctrine of the Mean" or asked: "As the old saying goes,' building a car behind closed doors' means that the methods are the same." It means: although the car is built behind closed doors at home, it can completely fit the rut when it is taken out. This is because there are certain specifications and sizes as standards. So it is called "behind closed doors, go out together".