The economic prosperity of southern China continued after Liu Song 's fall .
Was greatest during the succeeding Liang dynasty , which briefly reconquered the North with 7,000 troops under the command of general Chen Qingzhi .
The economic prosperity of southern China continued after Liu Song 's fall and was greatest during the succeeding Liang dynasty , which briefly reconquered the North with 7,000 troops under the command of general Chen Qingzhi .