The mystery woman who mastered IBM’s 5,400-character Chinese typewriter

That code wasn't the basis for unicode, where the mentioned characters have different offset in the common Chinese plane:

(map 'list (lambda (c) (- (char-code c) #x4e00)) "你他我") --> (352 214 5137)

But then, unicode has 20902 ideograms in that plane, while this typewriter had a shorter selection of 5400 ideograms.