It took a whole day to visit the sacred revolutionary sites in Yan'an, and Yang Jialing was the penultimate stop. Once in, I feel quite big. I feel that the places of work and life chosen by revolutionary martyrs are very open and comfortable. There are offices and former residences of revolutionary martyrs, as well as places for prestigious meetings. It's quite suitable for taking children or history fans to see, and most of the revolutionary memorial halls in Yan'an are free, quite good.