[ymeng] chinese-number: convert single digit to chinese word
[ymeng] chinese-number: convert normal decimal number to chinese word
[ymeng] chinese-number: convert very large decimal number to chinese word
[ymeng] chinese-number: skip zero when convert number that is less than 10000
[ymeng] chinese-number: rename field as constant
[ymeng] chinese-number: convert decimal number that ends with zero
[ymeng] chinese-number: ignore the first character when number start with 1X
[ymeng] chinese-number: append carry when number is integral multiple of a hundred thousand or a thousand million
[ymeng] chinese-number: skip zero when convert number that is larger than 10000
[ymeng] chinese-number: shrink variable type
[ymeng] chinese-number: enlarge decial number that is supported
[ymeng] chinese-number: hide unpublic constant