We may encounter many defeats but we must not be defeated.

语言是思想的皮肤。

数学是理性的音乐。

"The true journey of discovery consists not in seeking new landscapes, but in having new eyes."

材料有自己的智慧。

For those who do return back to the countryside, they find themselves very welcome locally, because with the knowledge, skills and networks they have learned in the cities, with the assistance of the Internet, they're able to create more jobs, upgrade local agriculture and create new business in the less developed market.