Under his rule , China progressed rapidly from the ruins of a civil war to a prosperous and powerful nation .
Emperor Taizong of Tang , the second ruler of the dynasty , is regarded as one of the greatest rulers in Chinese history .
Under Taizong of Tang 's rule , Chinese progressed rapidly from the ruins of a civil war to a prosperous and powerful nation .
Emperor Taizong of Tang , the second ruler of the dynasty , is regarded as one of the greatest rulers in Chinese history .