2 sentences

1. 各国不应干涉他国内政。

   gè guó bù yīng gān​shè tā​guó nèi​zhèng.

   Countries should not interfere in the internal affairs of others.

   Source: Dong Chinese Dictionary

2. 互不干涉内政是国际关系的基本准则。

   hù bù gān​shè nèi​zhèng shì guó​jì guān​xi de jī​běn zhǔn​zé.

   Non-interference in each other's internal affairs is a basic principle of international relations.

   Source: Dong Chinese Dictionary