Around this time, for Cui Hao's contributions, Emperor Taiwu awarded him several high titles. Cui often observed the stars at night, and he soaked copper in vinegar. Whenever he would see something unusual, he would use the copper as a pen and write his findings on paper. Knowing this, Emperor Taiwu often visited Cui's house at night to consult him, and despite Cui's inability to serve him with gourmet food, Emperor Taiwu would often eat at least some of the food that Cui offered before returning to his palace. When new vassals, Gaoche chiefs, arrived in Pingcheng, he introduced Cui Hao to them, with this commentary: