3 sentences

1. 我们要高举和平发展的旗帜。

   wǒ​men yào gāo​jǔ hé​píng fā​zhǎn de qí​zhì.

   We must uphold the banner of peaceful development.

   Source: Dong Chinese Dictionary

2. 我们应当高举和平与发展的旗帜。

   wǒ​men yīng​dāng gāo​jǔ hé​píng yǔ fā​zhǎn de qí​zhì.

   We should hold high the banner of peace and development.

   Source: Dong Chinese Dictionary

3. 他高举双手表示赞成。

   tā gāo​jǔ shuāng shǒu biǎo​shì zàn​chéng.

   He raised both hands high to show his approval.

   Source: Dong Chinese Dictionary