Nu Cuoi Phong Bi (Envelope Smile) was one of three first prize winners at the biennial Vietnam press cartoon contest.
The others are Nu Cuoi Viet Nam 1 (Vietnam's Smile 1) and Nu Cuoi Viet Nam 2 (Vietnam's Smile 2), done by painter Vu Thanh Hien (pen name Zin). The winning entries were chosen from among 420 works submitted by both amateur and professional cartoonists.
April 6 was also observed as Cartoon Day in the city with several activities including graffiti and cartoon exhibitions and music performances.
This is the fourth edition of the Bamboo Dragon Cup organised by The Thao & Van Hoa (Sports & Culture) newspaper.