In this scene Gong Jue sees his sister waiting for him at the Pavilion. 他不用再伏蛰，整个人一扫压抑，变得意气风发起来，宫以沫见他方才挥马来时，那眉眼中的快意潇洒，是曾经从来没见过的，在宫里，他沉静的可怕，此时才有十一岁少年该有的风采。 Any feedback is greatly appreciated!
He no longer needed to hide away. His whole person seemed to have swept away all the negative inhibitions that had been suppressing him, becoming energetic and high-spirited. When Gong Yimo saw him coming this way on horseback, the elation and excitement in his eyes was nothing like the usual unsettling calmness he carried in the palace, only now did the bearings of an eleven year old boy show itself in splendid fashion. Not sure if this is what you're looking for but this is my take on it.