Forbidden City appraisal expert Lu Tianye received the "Dunhuang Star Map" left by his father and was shocked to realize that it was actually the code of the chart drawn by Zheng He's fleet.
When he rushed to Dunhuang to rescue the archaeological team, he was attacked by international mercenaries. Before his teammates died, they shouted "East China Sea".
Lu Tianye used the star map to reorganize the three-dimensional coordinates of the Mogao Grottoes and open the entrance to the legendary "Yongle Basement".
