永乐
6.The Palace Museum was completed in 1420 when Emperor YongLe ruled in the Ming Dynasty.
9.MEASURING THE THICKNESS OF THE FAMOUS ANCIENT “GREAT BELL” IN BEIJING WITH ULTRASONIC METHOD
10.GLOBAL DYNAMIC ANALYSIS AND INTENSITY CHECKING FOR RINGING COURSE OF YONGLE BELL AND ITS SUSPENDING AND SUPPORTING SYSTEM USING FINITE ELEMENT METHOD


