Here's the information we found on your Chinese name "Lee Siu Long."
We have very little information about Chinese names, but as far as we can tell, this is a reasonable Chinese name.
"Li" was used as a family name in period. (1)
There are 12 characters used in names which are transliterated as "Shu" in modern Chinese. At least one of them was definitely used in period, since we have an example of a man named "Yin Shu" who lived from 1001-1047. (2) We also found a "Yao Siu" who lived from 1238-1314.
We have two examples of "Long" used as a third element in Chinese names: (2)
The character used means "dragon."
We think this name is reasonable for medieval Chinese, although weren't not completely sure that "Siu Long" is a plausible combination. Depending on the reasons your name was returned, this may or may not be helpful.
Solveig Throndarsdottir, Talan Gwynek, Arval Benicoeur, Rafael van Antwerpen, and Walraven van Nijmege contributed to this letter.
We hope this has been helpful, and that we can continue to assist you.
Academy of S. Gabriel
(1) "Chinese Surnames," article in "Proceedings of the Known World Heraldic Symposium."
(2) Schmidt-Glintzer, H. "Geschichte der chinesishcen Literatur."