Foreigners often make some strange mistakes in Chinese when they study the most difficult language--- ---Chinese. We try to analyze typical sentences to correct these errors.

          Nà ɡè dàxué yǒu shísān qiān rén.
False: 那个大学有十三千人。
          Nà ɡè dàxué yǒu yíwàn sānqiān rén.
True: 那个大学有一万三千人。

十三千是thirteen thousand的直译。汉语的数目是十进制的，个十百千万是五个基本的整数词。中间是十进位的相加关系。13000应当读作一万三千。
十三千 is the literal interpretation of thirteen thousand. In Chinese, the decimal system is used, and 个十百千万 are the five basic integrals.