What kind of situation did Northern Han face after Zhao Kuangyin went to Taiyuan?

In March, Zhao Kuangyin went to the southeast of Taiyuan City and set up four military camps outside Taiyuan City. Yang Ye rate cavalry hundreds of people rushed out of the city, direct attack Song Jun Dongzhai. Commander-in-Chief Dongzhai stood up to resist, and Northern Han soldiers came to help. Yang Ye finally dragged the rope hanging from the wall before going to town. In May, Song Jun besieged Taiyuan, filling the city with water, and Taiyuan was in danger.