3 sentences

1. 不要忘记你的初衷。

   bù yào wàng​jì nǐ de chū​zhōng.

   Don't forget your original intention.

   Source: Dong Chinese Dictionary

2. 这种做法有违我们的初衷。

   zhè zhǒng zuò​fǎ yǒu wéi wǒ​men de chū​zhōng.

   This approach goes against our original intention.

   Source: Dong Chinese Dictionary

3. 这架飞机的设计初衷是军用，而非民用。

   zhè jià fēi​jī de shè​jì chū​zhōng shì jūn​yòng, ér fēi mín​yòng.

   This aircraft was originally designed for military rather than civilian use.

   Source: Dong Chinese Dictionary