2 sentences for 子孙 (zǐ​sūn — posterity)

1. 愿神灵降下福泽，永祐子孙后代平安喜乐。

   yuàn shén​líng jiàng​xià fú​zé, yǒng yòu zǐ​sūn hòu​dài píng'ān xǐ​lè.

   May the gods bestow blessings and forever protect descendants with peace and joy.

   Source: Dong Chinese Dictionary

2. 我们要保护环境，为子孙后代留下绿水青山。

   wǒ​men yào bǎo​hù huán​jìng, wèi zǐ​sūn hòu​dài liú​xià lǜ​shuǐ qīng​shān.

   We must protect the environment to leave green mountains and clear waters for future generations.

   Source: Dong Chinese Dictionary