The Vietnamese representative was also awarded the best national costume sub-title as she donned an outfit by designer Kien Vu which draws inspiration from the Lunar Year of the Dragon.
The awards gathered together nearly 80 teen models from over 10 countries worldwide who were then divided into three age groups, including three to six, seven to 11, and 12 to 16.
The judging panel consists of members from Thailand, China, Japan, Malaysia, and Vietnam.
Earlier, Nhu Dinh modelled in a fashion show by designer Karl Lagerfeld during the Hong Kong Kids Fashion Week.