text: "I always hide my feelings in the depths of my soul, so that every time I think about them I smile and learn from them and move on," Duong Trieu Vu added?
classes:  No, the past is always the motivation for Yang Zhaoyu to smile forward.  Also, the past is always the motivation for Yang Zhaoyu to smile forward.  Yes, the past is always the motivation for Yang Zhaoyu to smile forward.