4 sentences

1. 演员们正在后台穿戴行头。

   yǎn​yuán men zhèng​zài hòu​tái chuān​dài xíng​tou.

   The actors are putting on their costumes and gear backstage.

   Source: Dong Chinese Dictionary

2. 他换了一身新行头，准备去相亲。

   tā huàn le yī shēn xīn xíng​tou, zhǔn​bèi qù xiāng​qīn.

   He put on a new outfit to prepare for his blind date.

   Source: Dong Chinese Dictionary

3. 他换上这身新行头后，整个人看起来精神多了。

   tā huàn​shàng zhè shēn xīn háng​tóu hòu, zhěng gè rén kàn qi​lai jīng​shen duō le.

   He looks much sharper after changing into this new outfit.

   Source: Dong Chinese Dictionary

4. 京剧演员的行头通常非常精美，反映了角色的身份。

   Jīng​jù yǎn​yuán de háng​tóu tōng​cháng fēi​cháng jīng​měi, fǎn​yìng le jué​sè de shēn​fèn.

   Peking Opera costumes are usually very exquisite and reflect the character's identity.

   Source: Dong Chinese Dictionary