A metaphor for meticulously searching for and collecting rare and precious items; to gather valuable and unusual treasures.
这位收藏家穷其一生，走遍各地，铁网珊瑚般搜罗各种古籍善本，终于建成了自己的私人图书馆。
This collector spent his entire life traveling everywhere, like using an iron net to gather coral, meticulously collecting various rare ancient books, and finally established his own private library.
Era:
Ancient
Frequency:
Story:
During the Tang Dynasty, people in the Fulin Kingdom began to excavate coral from the seabed. Because coral parasitizes on rocks, it initially appeared white like mushrooms, then turned yellow after a year, and red after three years. With its intricate and varied forms, it was considered a rare and precious treasure at that time. Fishermen would sail to coral islands, sink iron nets into the water, and then drag them out using the power of their boats to harvest the coral.
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