In Chinese history， ________was regarded as the first Emperor who unified China in ideology.（ ） A: Qin Shihuang B: Zhou Wenwang C: Han Wudi D: Zhou Wuwang

Who fixed the date of the Spring Festival? ( ) A: Emperor Wudi in the Han Dynasty B: Emperor Jingdi in the Han Dynasty C: Emperor Huidi in the Han Dynasty D: Emperor Shaodi in the Han Dynasty