the number of wild leopard n followed by it is the year of production. According to the relevant public information, there is a steel seal in the middle part of each pole of the Wild Leopard Club. The Wild Leopard Club will put the steel seal number on record when it leaves the factory, and the manufacturer can use this steel seal to track the product, so as to know which authorized dealer the pole was given to, and the N plus number represents the production year.