Both the oracle bone script (甲骨文) and金文show that Li refers to container used for weddings.
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Li is shown as a set of rules. Within this system, the emperor is on the top, the ministers at the bottom.
All affairs of the world are supposedly represented by the 64 hexagrams. ( )
The character谦 has two parts: the left part means speech and the right one兼, meaning 兼顾.
Lao Zi and his Taoism were not worshiped in Tang Dynasty.