Homonymous names are a quite common problem in dblp. You may find papers by at least seven different persons with the name Chen Li. In these cases, we add some small, unique "mystical" number to make these homonyms distinguishable in the dblp XML format:

<author>Chen Li</author>
<author>Chen Li 0002</author>
<author>Chen Li 0007</author>

This extended name will be used in each record to uniquely identify the specific instance of an author with a given name. Note that '' without a suffix is distinct from all instances with a suffix, say 'Chen Li' or 'Chen Li'. The four digit number is also part of the URL that leads to the author's page, e.g.

http://dblp.uni-trier.de/pers/hy/l/Li_0007:Chen.html

However, the number is (usually) suppressed when the bibliographic metadata of a paper is printed on a web page, or exported as BibTeX.