Question to those know a lot more about Prev Visa i.e. non first time applicants

How far back they can find the previous Visa in record?

We had a 2 years multi entries visa just before the 10 years became possible. We actually used it only once, because the spouse did not want to do a second visit to China. So it must be before 2014? Could that help us in applying a 10 years or still a no go due to the "laws" that we are Chinese nationality in the Chinese government's definition?