1, also called "Shuoyuan". From Song Dynasty's Seclusion Miscellaneous Books: "The Yellow River traces its source under the fire."
2. The source also comes from Tang Yongtong's History of Buddhism in Han, Wei, Southern and Northern Dynasties: "Yin and Yang, five elements, astronomy, medical classics and houses all trace back to the Yellow Emperor."
In addition, it is also used to describe the upward search for historical sources. Among them, the Qing Dynasty's "Bao Xu" said: "According to the regulations of Bailu Cave, King Jinsha compiled a study case, which started from Zhusi, detained the items set by Zhongyuan and Zhenxi Mountain, and reached an agreement of high esteem, care and friendship."
4. Relevant examples
(1) In addition, consumers can scan the code and ask for rice.
(2) From this, I can trace the source, study the mystery, be handy and self-motivated, and feel that the pen will come naturally.
(3) research knowledge should be able to trace back to the source and seek the root of knowledge.