Its 16 years between the two contracts. Liu Guoliang signed the contract in 1993 and Xu Xin signed the contract in 2009 which makes the difference as 16. .
Cheers!!!
There are 16 years between the signing of STIGA's Liu Guoliang and Xu Xin. They are two phenomenal penholders from each of their generation! Congratulations being a part of a 70 old company with a lot of success.