2 sentences

1. 这位老教授非常关心后进的成长。

   zhè wèi lǎo jiào​shòu fēi​cháng guān​xīn hòu​jìn de chéng​zhǎng.

   The old professor is very concerned about the growth of the younger generation.

   Source: Dong Chinese Dictionary

2. 我们要努力帮助后进地区发展经济。

   wǒ​men yào nǔ​lì bāng​zhù hòu​jìn dì​qū fā​zhǎn jīng​jì.

   We must strive to help underdeveloped regions develop their economies.

   Source: Dong Chinese Dictionary