China Step Empress who Disappeared from History | Step Empress Ulnara (Nara/Ruyi)

Step Empress Ulnara/Nara was the second Empress of Emperor Qianlong during 1750-1766. From a Secondary consort to an Empress, Nara gradually became the most powerful woman in Qing dynasty. However, as an Empress, why were all her traces in paintings removed in the end?

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