GFT9

 (Jiǔ 九=nine) the number nine represents longevity as the word Jiǔ is a pun on the word forever. The doors at the forbidden city have large door nail rivets 9 across and nine down; the #9 was a favourite number of many emperors as 9 was the largest number digit and whenever 9 is multiplied with any number the sum is always 9, 9x9=81 (8+1=9); 81+81=162 (1+6+2=9) ;(9x6=54) 5+4=9;The number nine is often integrated in amounts in imperial structures and designs.