This episode of a series of Chinese lectures on Tang Taizhong is interesting. Those who can understand Chinese should enjoy watching. You may want to see the rest of the lectures in this series.
http://tv.cntv.cn/video/C10302/e2c71a130ad442d6add87a44b4b1df92
http://tv.cntv.cn/video/C10302/e2c71a130ad442d6add87a44b4b1df92