1 sentence

1. 由于长期低头看手机，他的脖颈感到非常僵硬。

   yóu​yú cháng​qī dī​tóu kàn shǒu​jī, tā de bó gěng gǎn​dào fēi​cháng jiāng​yìng.

   Due to looking down at his phone for long periods, his neck feels very stiff.

   Source: Dong Chinese Dictionary