This alliance was hugely unpopular with locals in the regions under Sun's control, with Zhang Zhongchang's northern troops viewed as invaders. The Zhejiang autonomy movement continued, and a meeting of influential provincial figures, nominally loyal to Sun, was held in Shanghai on 8 December. In Fujian, many of Sun's troops had already defected to the NRA, and on 9 December, He Yingqin's army entered Fuzhou unopposed. On 11 December, Zhejiang commander Zhou Fengqi announced his defection to the NRA. This started a cascade of defections, leading to Zhejiang's secession from Sun's "United Provinces", after which it was given autonomous status by the Guangzhou government. In response, Sun rallied his army on Zhejiang border, with the NPA protecting his rear, and charged into Zhejiang, retaking most of the province. By 10 January, the majority of the Zhejiang rebel forces had retreated to Quzhou. To relieve the besieged rebels, He Yingqin pushed his Fujian-based forces into Zhejiang, halting Sun's advance. The rebel and KMT forces merged under the command of Bai Chongxi, who launched a counteroffensive on 20 January. By 29 January, the offensive had reached Lanxi and Jinhua, where a fierce battle resulted in a catastrophic defeat for Sun's forces. Following this victory, the NRA launched a pincer attack on provincial capital Hangzhou. Many of Sun's northern troops, demoralised by defeat, broke ranks and streamed north, looting the towns and villages they passed along the way. With his forces in disarray, Sun's commander in the area, Meng Chao-yueh, decided on 17 February to abandon Hangzhou and flee with his 20,000 troops by train to Jiangsu province. By 23 February, Zhejiang was under complete KMT control. In six months, the nationalists had expanded their control to seven provinces, inhabited by a population of about 170 million people. Aided by the defection of numerous warlords and their armies, by this point, the NRA had bolstered its ranks to 700,000.