I'm looking for two words.
In this order: Y B R
|-2 -13 +2|+3 -12 -2 -1|+7 -8 +4 +0|
The two words you are looking for are:
Magic Square
Because:
The three by three grid is a magic square, where each number has been replaced by its initial letter, and an ordinal representing its position in the list of numbers starting with that letter (so 1 = o1, 2 = t1, 3 = t2, 4 = f1 etc.)
2 7 6 9 5 1 4 3 8 = t1 s2 s1 n1 f2 o1 f1 t2 e1And the image on the right is a hint, with "f4" (=15) at the top, and lines representing the directions that the magic square sums to 15.
So that gives us Y=o1=ONE, B=f1=FOUR and R=n1=NINE.
And the final line represents a letter shifts on each word in that order (so ONE with |-2-13+2| gives us O-2=M, N-13=A, E+2=G):
|MAG|ICSQ|UARE|
And for the title, magic squares were first invented/discovered (or at least first documented) in China.