4 sentences

1. 鸟类通常由北向南迁徙。

   niǎo​lèi tōng​cháng yóu běi xiàng​nán qiān​xǐ.

   Birds usually migrate from north to south.

   Source: AI Challenger 2017

2. 他们都向南旅行。

   tā​men dōu xiàng​nán lǚ​xíng.

   They all traveled south.

   Source: CCMatrix

3. 大雁由北向南飞。

   dà​yàn yóu běi xiàng​nán fēi.

   The wild geese fly from north to south.

   Source: AI Challenger 2017

4. 湄公河自北向南流经该国。

   méi​gōng​hé zì běi xiàng​nán liú jīng gāi guó.

   The Mekong River flows through the country from North to South.

   Source: United Nations