\u则代表unicode编码，是一个字符；
0x开头代表十六进制，实际上就是一个整数；
\x对应的是UTF-8编码的数据，通过转化规则可以转换为Unicode编码，就能得到对应的汉字，转换规则很简单，先将\x去掉，转换为数字;
Unicode Chart：
https://www.ssec.wisc.edu/~tomw/java/unicode.html
| Range | Decimal | Name |
|---|---|---|
| 0x0000-0x007F | 0-127 | Basic Latin |
| 0x0080-0x00FF | 128-255 | Latin-1 Supplement |
| 0x0100-0x017F | 256-383 | Latin Extended-A |
| 0x0180-0x024F | 384-591 | Latin Extended-B |
| 0x0250-0x02AF | 592-687 | IPA Extensions |
| 0x02B0-0x02FF | 688-767 | Spacing Modifier Letters |
| 0x0300-0x036F | 768-879 | Combining Diacritical Marks |
| 0x0370-0x03FF | 880-1023 | Greek |
| 0x0400-0x04FF | 1024-1279 | Cyrillic |
| 0x0530-0x058F | 1328-1423 | Armenian |
| 0x0590-0x05FF | 1424-1535 | Hebrew |
| 0x0600-0x06FF | 1536-1791 | Arabic |
| 0x0700-0x074F | 1792-1871 | Syriac |
| 0x0780-0x07BF | 1920-1983 | Thaana |
| 0x0900-0x097F | 2304-2431 | Devanagari |
| 0x0980-0x09FF | 2432-2559 | Bengali |
| 0x0A00-0x0A7F | 2560-2687 | Gurmukhi |
| 0x0A80-0x0AFF | 2688-2815 | Gujarati |
| 0x0B00-0x0B7F | 2816-2943 | Oriya |
| 0x0B80-0x0BFF | 2944-3071 | Tamil |
| 0x0C00-0x0C7F | 3072-3199 | Telugu |
| 0x0C80-0x0CFF | 3200-3327 | Kannada |
| 0x0D00-0x0D7F | 3328-3455 | Malayalam |
| 0x0D80-0x0DFF | 3456-3583 | Sinhala |
| 0x0E00-0x0E7F | 3584-3711 | Thai |
| 0x0E80-0x0EFF | 3712-3839 | Lao |
| 0x0F00-0x0FFF | 3840-4095 | Tibetan |
| 0x1000-0x109F | 4096-4255 | Myanmar |
| 0x10A0-0x10FF | 4256-4351 | Georgian |
| 0x1100-0x11FF | 4352-4607 | Hangul Jamo |
| 0x1200-0x137F | 4608-4991 | Ethiopic |
| 0x13A0-0x13FF | 5024-5119 | Cherokee |
| 0x1400-0x167F | 5120-5759 | Unified Canadian Aboriginal Syllabics |
| 0x1680-0x169F | 5760-5791 | Ogham |
| 0x16A0-0x16FF | 5792-5887 | Runic |
| 0x1780-0x17FF | 6016-6143 | Khmer |
| 0x1800-0x18AF | 6144-6319 | Mongolian |
| 0x1E00-0x1EFF | 7680-7935 | Latin Extended Additional |
| 0x1F00-0x1FFF | 7936-8191 | Greek Extended |
| 0x2000-0x206F | 8192-8303 | General Punctuation |
| 0x2070-0x209F | 8304-8351 | Superscripts and Subscripts |
| 0x20A0-0x20CF | 8352-8399 | Currency Symbols |
| 0x20D0-0x20FF | 8400-8447 | Combining Marks for Symbols |
| 0x2100-0x214F | 8448-8527 | Letterlike Symbols |
| 0x2150-0x218F | 8528-8591 | Number Forms |
| 0x2190-0x21FF | 8592-8703 | Arrows |
| 0x2200-0x22FF | 8704-8959 | Mathematical Operators |
| 0x2300-0x23FF | 8960-9215 | Miscellaneous Technical |
| 0x2400-0x243F | 9216-9279 | Control Pictures |
| 0x2440-0x245F | 9280-9311 | Optical Character Recognition |
| 0x2460-0x24FF | 9312-9471 | Enclosed Alphanumerics |
| 0x2500-0x257F | 9472-9599 | Box Drawing |
| 0x2580-0x259F | 9600-9631 | Block Elements |
| 0x25A0-0x25FF | 9632-9727 | Geometric Shapes |
| 0x2600-0x26FF | 9728-9983 | Miscellaneous Symbols |
| 0x2700-0x27BF | 9984-10175 | Dingbats |
| 0x2800-0x28FF | 10240-10495 | Braille Patterns |
| 0x2E80-0x2EFF | 11904-12031 | CJK Radicals Supplement |
| 0x2F00-0x2FDF | 12032-12255 | Kangxi Radicals |
| 0x2FF0-0x2FFF | 12272-12287 | Ideographic Description Characters |
| 0x3000-0x303F | 12288-12351 | CJK Symbols and Punctuation |
| 0x3040-0x309F | 12352-12447 | Hiragana |
| 0x30A0-0x30FF | 12448-12543 | Katakana |
| 0x3100-0x312F | 12544-12591 | Bopomofo |
| 0x3130-0x318F | 12592-12687 | Hangul Compatibility Jamo |
| 0x3190-0x319F | 12688-12703 | Kanbun |
| 0x31A0-0x31BF | 12704-12735 | Bopomofo Extended |
| 0x3200-0x32FF | 12800-13055 | Enclosed CJK Letters and Months |
| 0x3300-0x33FF | 13056-13311 | CJK Compatibility |
| 0x3400-0x4DB5 | 13312-19893 | CJK Unified Ideographs Extension A |
| 0x4E00-0x9FFF | 19968-40959 | CJK Unified Ideographs |
| 0xA000-0xA48F | 40960-42127 | Yi Syllables |
| 0xA490-0xA4CF | 42128-42191 | Yi Radicals |
| 0xAC00-0xD7A3 | 44032-55203 | Hangul Syllables |
| 0xD800-0xDB7F | 55296-56191 | High Surrogates |
| 0xDB80-0xDBFF | 56192-56319 | High Private Use Surrogates |
| 0xDC00-0xDFFF | 56320-57343 | Low Surrogates |
| 0xE000-0xF8FF | 57344-63743 | Private Use |
| 0xF900-0xFAFF | 63744-64255 | CJK Compatibility Ideographs |
| 0xFB00-0xFB4F | 64256-64335 | Alphabetic Presentation Forms |
| 0xFB50-0xFDFF | 64336-65023 | Arabic Presentation Forms-A |
| 0xFE20-0xFE2F | 65056-65071 | Combining Half Marks |
| 0xFE30-0xFE4F | 65072-65103 | CJK Compatibility Forms |
| 0xFE50-0xFE6F | 65104-65135 | Small Form Variants |
| 0xFE70-0xFEFE | 65136-65278 | Arabic Presentation Forms-B |
| 0xFEFF-0xFEFF | 65279-65279 | Specials |
| 0xFF00-0xFFEF | 65280-65519 | Halfwidth and Fullwidth Forms |
| 0xFFF0-0xFFFD | 65520-65533 | Specials |
| Notes |