4 sentences

1. 间谍正在秘密联络他的上线。

   jiàn​dié zhèng​zài mì​mì lián​luò tā de shàng​xiàn.

   The spy is secretly contacting his handler.

   Source: Dong Chinese Dictionary

2. 我们的新网站昨天正式上线了。

   wǒ​men de xīn wǎng​zhàn zuó​tiān zhèng​shì shàng​xiàn le.

   Our new website officially went live yesterday.

   Source: Dong Chinese Dictionary

3. 这款新型号的手机下周开始上线生产。

   zhè kuǎn xīn xíng​hào de shǒu​jī xià zhōu kāi​shǐ shàng​xiàn shēng​chǎn.

   Production of this new mobile phone model will begin next week.

   Source: Dong Chinese Dictionary

4. 他的成绩已经上线了，可以填报这所大学。

   tā de chéng​jì yǐ​jīng shàng​xiàn le, kě​yǐ tián​bào zhè suǒ dà​xué.

   His scores have met the required cutoff, so he can apply for this university.

   Source: Dong Chinese Dictionary