A girl dressed in traditional costume rides horse during the Independence Day celebration in Oaxaca City, Oaxaca State, Mexico, on Sept. 16, 2015. (Xinhua/Li Mengxin)

A girl dressed in traditional costume with national flag colors attends the Independence Day celebration in Oaxaca City, Oaxaca State, Mexico, on Sept. 16, 2015. (Xinhua/Li Mengxin)

Singers dressed in national flag colors perform during the Independence Day celebration in Oaxaca City, Oaxaca State, Mexico, on Sept. 16, 2015. (Xinhua/Li Mengxin)

A girl dressed in traditional costume rides horse during the Independence Day celebration in Oaxaca City, Oaxaca State, Mexico, on Sept. 16, 2015. (Xinhua/Li Mengxin)