What does it mean to sign a horse and run on the bamboo bridge?

The meaning of this passage is: on the road of life, sometimes there will be smooth times and difficult times. Be flexible, always keep your mind and will, stick to your beliefs and goals, and finally get freedom and happiness. This is a classical Chinese article similar to "drawing lots", which contains some idioms and allusions. According to the linguistic features of classical Chinese, it is difficult to directly translate the meaning of this passage into modern Chinese, and some explanations are needed. Among them, "lottery" refers to drawing lots for luck, similar to modern divination. In ancient times, people often decided their actions by drawing lots to seek guidance from the gods. "Horse crossing the bamboo bridge" is an idiom, which means that things are going smoothly without any obstacles.