That year, after a rebellion secretly instigated by Lan Han, Murong Bao and Murong Sheng were forced to flee from the capital Longcheng (龍城, in modern Jinzhou, Liaoning).
During that flight, Princess Lan was described to have carefully served her mother-in-law, Murong Bao's concubine Consort Ding.
Later that year, Murong Sheng overthrew Lan Han in a coup and restored Later Yan as its emperor.
Murong Sheng never created another person as empress during his reign, either, suggesting that he still considered Princess Lan as his wife.
Murong Sheng was assassinated in 401, and no further historical reference was made to Princess Lan after that point.