Chinese is a kind of hieroglyph. The shape of "凹" is very similar to the logo of this project, and it looks like the letter "C" rotated 90 degrees counterclockwise. So it maybe means a C/Coder that lies down.
Over 7million programmers in China have to learn English first before they can study how to program, for most of them, "下标不可超过数组长度" is much more easier to understand than "the index of a array should not exceed it's length".
Chinese is a kind of hieroglyph. The shape of "凹" is very similar to the logo of this project, and it looks like the letter "C" rotated 90 degrees counterclockwise. So it maybe means a C/Coder that lies down.