The paper talks about how the Ming dynasty emperor in 14th-century China did something different by building his tomb within the capital city, Nanjing. This was unusual because traditionally, tombs were kept separate from where people lived. The emperor's decision to do this was a way of honoring his ancestors and showing their importance in building the dynasty. The researchers looked at old texts like ritual books and poetry to understand how this unique capital-mausoleum arrangement reflected the emperor's respect for his ancestors and his vision for the dynasty.