to the left of the coffin was a door , which led into an inner chamber . in this chamber stood a bed , and a table with books and clothing , all as though meant for the use of a living person . tsin schi huang seated himself on the bed and looked down . and there on the floor stood two shoes of red silk , whose tips were adorned with a woven pattern of clouds . a bamboo staff leaned against the wall . the emperor , in jest , put on the shoes , took the staff and left the grave . but as he did so a tablet suddenly appeared before his eyes on which stood the following lines : o'er kingdoms six tsin schi huang his army led , to ope my grave and find my humble bed ; he steals my shoes and takes my staff away to reach schakiu -- and his last earthly day ! 
the emperor , in jest , put on the shoes , took the staff and left the grave .
why did a tablet suddenly appear in front of emperor tsin schi huang ?
why did a tablet suddenly appear in front of emperor tsin schi huang ?