Hi, Hans:

I review the source code for chinese numbers, and hereare my comments:

> 1     Ò»       Ò»       Ò¼
right

> 10    Ê®       Ê®       Ê°
right

> 15    Ê®Îå      Ê®Îå      Ê°Îé
right

> 25    ¶þÊ®Îå     Ø¥Îå      ·¡Ê°Îé
right

> 35    ÈýÊ®Îå     ئÎå      ÈþÊ°Îé
right

> 45    ËÄÊ®Îå     ËÄÊ®Îå     ËÁÊ°Îé
right

> 11    ʮһ      ʮһ      ʰҼ
right

>100    °Ù       °Ù       °Û
wrong  should be Ò»°Ù

> 111   °Ùʮһ     °Ùʮһ     °ÛÊ°Ò¼
wrong, Ò»°Ùʮһ

>1111   ǧ°Ùʮһ    ǧ°Ùʮһ    Ǫ°ÛÊ°Ò¼
һǧһ°Ùʮһ

> 10000 Íò       Íò       Èf
Ò»Íò

> 11111 Íòǧ°Ùʮһ   Íòǧ°Ùʮһ   ÈfǪ°ÛÊ°Ò¼
Ò»Íòһǧһ°Ùʮһ

> 100000        Ê®Íò      Ê®Íò      Ê®Èf
right

> 111111        ʮһÍòǧ°Ùʮһ ʮһÍòǧ°Ùʮһ ʮһÈfǪ°ÛÊ°Ò¼
ʮһÍòһǧһ°Ùʮһ

> 1111111       °ÙʮһÍòǧ°Ùʮһ        °ÙʮһÍòǧ°Ùʮһ        °ÙʮһÈfǪ°ÛÊ°Ò¼
Ò»°ÙʮһÍòһǧһ°Ùʮһ

> 11111111      ǧ°ÙʮһÍòǧ°Ùʮһ       ǧ°ÙʮһÍòǧ°Ùʮһ       ǧ°ÙʮһÈfǪ°ÛÊ°Ò¼
һǧһ°ÙʮһÍòһǧһ°Ùʮһ

> 111111111     ÒÚǧ°ÙʮһÍòǧ°Ùʮһ      ÒÚǧ°ÙʮһÍòǧ°Ùʮһ      ÒÚǧ°ÙʮһÈfǪ°ÛÊ°Ò¼
Ò»ÒÚһǧһ°ÙʮһÍòһǧһ°Ùʮһ

> 100000000     ÒÚ       ÒÚ       ÒÚ
Ò»ÒÚ

> 1111111111    ʮһÒÚǧ°ÙʮһÍòǧ°Ùʮһ    ʮһÒÚǧ°ÙʮһÍòǧ°Ùʮһ    ʮһÒÚǧ°ÙʮһÈfǪ°ÛÊ°Ò¼
ʮһÒÚһǧһ°ÙʮһÍòһǧһ°Ùʮһ
> 11111111111   °ÙʮһÒÚǧ°ÙʮһÍòǧ°Ùʮһ   °ÙʮһÒÚǧ°ÙʮһÍòǧ°Ùʮһ   °ÙʮһÒÚǧ°ÙʮһÈfǪ°ÛÊ°Ò¼
Ò»°ÙʮһÒÚһǧһ°ÙʮһÍòһǧһ°Ùʮһ

> 111111111111  ǧ°ÙʮһÒÚǧ°ÙʮһÍòǧ°Ùʮһ  ǧ°ÙʮһÒÚǧ°ÙʮһÍòǧ°Ùʮһ  ǧ°ÙʮһÒÚǧ°ÙʮһÈfǪ°ÛÊ°Ò¼
һǧһ°ÙʮһÒÚһǧһ°ÙʮһÍòһǧһ°Ùʮһ

> 1111111111111 Íòǧ°ÙʮһÒÚǧ°ÙʮһÍòǧ°Ùʮһ Íòǧ°ÙʮһÒÚǧ°ÙʮһÍòǧ°Ùʮһ Íòǧ°ÙʮһÒÚǧ°ÙʮһÈfǪ°ÛÊ°Ò¼
Ò»Íòһǧһ°ÙʮһÒÚһǧһ°ÙʮһÍòһǧһ°Ùʮһ

for k, v in ipairs { 1001, 1010,1011, 10001, 11001, 10100, 1234, 123456789 } do
   print(v,tochinese(v),tochinese(v,"all"),tochinese(v,"cap"))
end


> 1001  ǧһ      ǧһ      ǪҼ
wrong,  һǧÁãÒ»

>1010   ǧʮ      ǧʮ      Ǫʰ
һǧÁãÊ®

>1011   ǧʮһ     ǧʮһ     ǪʰҼ
һǧÁãʮһ

>10001  ÍòÒ»      ÍòÒ»      ÈfÒ¼
Ò»ÍòÁãÒ»

>11001  Íòǧһ     Íòǧһ     ÈfǪҼ
Ò»ÍòһǧÁãÒ»

>10100  Íò°Ù      Íò°Ù      Èf°Û
Ò»ÍòÁãÒ»°Ù

>1234   ǧ¶þ°ÙÈýÊ®ËÄ  ǧ¶þ°ÙئËÄ   Ǫ·¡°ÛÈþÊ°ËÁ
һǧ¶þ°ÙÈýÊ®ËÄ

>123456789      ÒÚ¶þǧÈý°ÙËÄÊ®ÎåÍòÁùǧÆß°Ù°ËÊ®¾Å        ÒÚ¶þǧÈý°ÙËÄÊ®ÎåÍòÁùǧÆß°Ù°ËÊ®¾Å        ÒÚ¶þǧÈý°ÙËÄÊ®ÎåÈf½ǪÆâ°Û°ÆÊ°¾Á
Ò»ÒÚ¶þǧÈý°ÙËÄÊ®ÎåÍòÁùǧÆß°Ù°ËÊ®¾Å

Yue Wang