千里草

Etymology
千 (one thousand) + 里 (li) + 草 (grass)
 * The Chinese character for Dong is 董. The character 董 is composed of three components: 千 (one thousand) + 里 (li) + 艹 (grass). In other words, the phrase, "The grass spreads out for thousands of li" is a veiled reference to the Dong surname.

Noun

 * 1)  a veiled reference to the Dong (董) surname
 * 2)  which spreads out for more than 1,000 li