Find an explanation of an ancient poem!

Two poems are engraved on the walls on both sides of the main entrance of Qingfeng Temple. On the left is Li Shimin's poem "Looking at the Moon in Liaocheng". At the beginning of the moon, the moon shines brightly on the Liao boundary ... and I stayed at Wandu, watching the devil's atmosphere disappear. This poem was written by Wen Tongchun, a famous calligrapher. On the right is a poem entitled "Su Jiangxuan visits Liaoyang, and a hundred herbs are fragrant and warm in the sun" ... Moss in the forest invades the path, and new flowers decorate the female wall on the wall ... "This poem was written by calligrapher Yang Yulin. Both poems describe and praise the first mountain. These two emperors were the most successful emperors in the history of China. The rule of Zhenguan in the era of Emperor Taizong and the prosperous time of Kangxi in the Qing Dynasty were the most brilliant peaceful and prosperous times in the history of the Chinese nation. Both emperors have been to Shoushan, leaving poems, which really beautified Shoushan. The poem says: the trace of the Double Sage cannot be found, and the long road is scattered with smoke, but there are poems carved on the temple wall, and the ancient temple is full of gods.