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

Fight the mob with elite troops! Boss Zeng has a first-class ability in making money. Although the imperial court does not issue military pay, Boss Zeng goes everywhere to persuade him to pay! After getting a lot of money, the Hunan Army was well-equipped, and a few thousand people dared to fight against the Taiping Army's tens of thousands or even one hundred thousand! The only opportunity was wasted by Chen Yucheng of the Taiping Army. Chen Yucheng threatened Wuhan with 200,000 troops, but Wuhan was defended by only a few hundred people! The foreigners in Wuhan threatened to attack the Tianping Heavenly Kingdom together. Chen Yucheng was afraid of withdrawing his troops. The only opportunity to cut off the Hunan Army's base camp and cut off its supplies was lost! Later, Zeng Tietong went out to defeat Anqing and went to Nanjing. 20,000 Hunan troops surrounded 200,000 Taiping troops! Finally, the city was broken and killed for 7 days!