物尽其用 make full use of everything
Explanation
物尽其用指各种东西凡有可用之处，都要尽量利用。充分利用资源，一点不浪费。
The idiom "wù jìn qí yòng" means that all things that can be used should be utilized to the greatest extent possible. It emphasizes the importance of making full use of resources and avoiding any waste.
Origin Story
在一个偏远的小山村里，住着一位名叫李大娘的老妇人。她一生勤俭持家，深谙物尽其用的道理。她家的院子虽然不大，却种满了各种蔬菜瓜果，甚至连墙角旮旯都利用起来种上了香草。每年收获的粮食和蔬菜足够一家人吃用，剩下的则晒干储存或制作成腌菜，一点也不浪费。李大娘还擅长缝缝补补，把旧衣服改成新衣，把破旧的布料做成抹布、鞋垫，直到完全不能再用为止。她把柴火节省地使用，利用余热烧水做饭，并且收集雨水用来浇菜，极大地节约了水资源。村里人都说李大娘家家境虽然不算富裕，但生活却过得有滋有味，这都是因为她懂得物尽其用，勤俭持家。
In a remote mountain village, lived an old woman named Li Dama. She had always been thrifty, and deeply understood the meaning of "wù jìn qí yòng". Her courtyard was small but filled with various vegetables and fruits; even the corners and crannies were utilized to grow herbs. Every year, the harvest of grains and vegetables was sufficient for her family, and the remainder were dried, stored, or processed into pickles, so that nothing was wasted. Li Dama was also skilled in sewing and patching; she transformed old clothes into new ones, and made rags and shoe pads from old cloth, until they were completely unusable. She conserved firewood; used residual heat for cooking, and collected rainwater for watering the vegetables, substantially saving water resources. The villagers all said that although Li Dama's family wasn't wealthy, their life was full and flavorful; all because she understood the virtue of "wù jìn qí yòng" and being thrifty.
Usage
通常作宾语、定语；指充分利用。
Usually used as an object or attribute; refers to the full utilization of resources.
Examples
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这件工具物尽其用，非常实用。
zhè jiàn gōngjù wùjìn qí yòng, fēicháng shíyòng.
This tool is very useful and fully utilized.
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我们应该物尽其用，减少浪费。
wǒmen yīnggāi wùjìn qí yòng, jiǎnshǎo làngfèi.
We should make the most of our resources and reduce waste.