Complex sentence: After their victory at Sanhe, Chen Yucheng and Li Xiucheng continued their offensive southward, and the imperial army had to abandon Shucheng and withdrew to Tongcheng, and on November 24,1858, Li's and Chen's Taiping troops took Tongcheng.
Split into simpler sentences: After their victory at Sanhe, Chen Yucheng and Li Xiucheng continued their offensive southward, and the imperial army had to abandon Shucheng and withdrew to Tongcheng. On November 24 Li's and Chen's Taiping troops took Tongcheng.