4 sentences

1. 他比较喜欢买国产商品。

   tā bǐ​jiào xǐ​huan mǎi guó​chǎn shāng​pǐn.

   He prefers to buy domestic products.

   Source: Dong Chinese Dictionary

2. 这艘国产航母今天正式在上海下水。

   zhè sōu guó​chǎn háng​mǔ jīn​tiān zhèng​shì zài Shàng​hǎi xià​shuǐ.

   This domestically produced aircraft carrier was officially launched in Shanghai today.

   Source: Dong Chinese Dictionary

3. 导演张扬执导过许多优秀的国产电影。

   dǎo​yǎn Zhāng Yáng zhí​dǎo guo xǔ​duō yōu​xiù de guó​chǎn diàn​yǐng.

   Director Zhang Yang has directed many excellent domestic films.

   Source: Dong Chinese Dictionary

4. 这部电影的特效简直是国产科幻片的天花板。

   zhèi bù diàn​yǐng de tè​xiào jiǎn​zhí shì guó​chǎn kē​huàn​piàn de tiān​huā​bǎn.

   The special effects in this movie are the absolute pinnacle for domestic sci-fi films.

   Source: Dong Chinese Dictionary