That dried-up, skinny old codger could give an informal lecture that took you from the Qinghai-Tibet Plateau all the way down to Hainan Island, or from the Taihang Range to Huangguoshu Falls.

• 那干瘦老头居然能从青藏高原扯到海南岛，从太行山扯到黄果树瀑布。