Why did Zeng Guofan suppress the Taiping Heavenly Kingdom with only 100,000 Xiang troops?

Fight the mob with elite soldiers! Boss Zeng has first-class money. Although the imperial court didn't pay him, Mr. Zeng persuaded him everywhere! A lot of money, well-equipped, thousands of people dare to fuck tens of thousands or even hundreds of thousands of Taiping rebels! The only chance was wasted by Taiping Army Chen Yucheng. Chen Yucheng's 200,000 troops threatened Wuhan, and only a few hundred people defended it! Wuhan foreigners threatened to compete with the kingdom of heaven, Chen Yucheng was afraid of withdrawing troops, and the only chance to supply Duanxiang in the base camp was lost! Later, Tietong came out, broke Anqing to Nanjing, and 20,000 Xiang troops besieged 200,000 Taiping troops! Finally, the city was broken and killed for 7 days!