Meaning of a Fan Inscription
It is a 棋諺 (Go saying/ common wise words for Go playing).

見棋不是棋 would mean the hand that's obvious to you is not the hand --- meaning you need to look beyond the obvious and decide your move with more in-depth analysis.

Simply put: If a move is obvious to you, it would also be obvious to your opponent, therefore, it wouldn't be as effective as a surprise move.

Shu Ha Ri 守破離 is a martial art saying. The only commonality between 守破離 and 見棋不是棋 is they are both "saying/ common wise word" (口訣). 

Other 棋諺 I remember: 


左右同形中間有棋 : refers to "the middle point is the key to connecting two weak groups with the same shape". 
七死八活 : "seven dead, eight alive", referring to the minimum number of stones in a row on the side that you need in order to live.
白鶴守巢 : "white crane guarding nest" or, as usually translated into English: the crane's nest, a specific famous instance of a snapback.


I play Go too, but I am only at SDK level.