Sourdrang dowager once assisted the emperors of three dynasties, which can be said to be remarkable, but why was she buried outside the Feng Shui wall of the Qing imperial tomb after her death?

It's too simple. Xiaozhuang said "I love you father and son" before he died, so he made up his mind to be buried with his children and grandchildren. But she is also the concubine of Emperor Taizong and Huang Taiji, so she can only belong to a system with Zhao Ling of Huang Taiji. Therefore, it is necessary to separate her mausoleum from the Dongling of her children and grandchildren and make her mausoleum subordinate to Zhaoling. Because Zhaoling is in the northeast of her mausoleum, her mausoleum is called Zhaoxi Mausoleum, and together with the mausoleum of Cixi Cian, it is called Ding Dong Mausoleum.