What does Li Mo mean in the old saying "Gold is easy to get, but Li Mo is hard to find"?

"Gold is easy to get, but Li Mo is hard to find" comes from Song people? Write "Moggi".

The first ink maker recorded in the history books was Dan Wei (word lieutenant) in the Three Kingdoms period, and he has the reputation of "ink-like lieutenant". He is not only an ink maker, but also a calligrapher.

With the development of the times and the continuous improvement of ink-making technology, ink-making officials also appeared in the Tang Dynasty. The most famous Mohists are Yi Shui and Ding Brothers. They summed up the experience of predecessors, improved the method, and steamed the ink with antler glue to make the ink "rich in muscle greasy" and "oily as paint". Since the Southern Tang Dynasty, Li Yu, the queen of the Southern Tang Dynasty, has been given the title of Li because of her love of ink. The ink they made is called "Li Mo", and there is a saying that "gold is easy to get, but Li Mo is hard to find". Li Mo was later called "Li Tinggui Mo".

Li Tinggui, a famous Mohist in the Southern Tang Dynasty, was originally named Xi Tingjue, and his ancestral home was Yizhou (now Yixian County, Hebei Province). At the end of the Tang Dynasty, he moved to Zhangzhou, where he made excellent ink. He won the appreciation of Li Yu, the queen of the Southern Tang Dynasty, and served as an ink official, giving him the title and changing his name to Li Tinggui. Song people called his ink "the best in the world". During the Northern Song Dynasty and the Qing Dynasty, there was a phenomenon that its ink value was ten thousand yuan.