The 21st China International Advertising Festival opened in Guiyang on October 25 and will last until October 27.

Visitors at the China International Advertising Festival experience the DIY postcards platform.[Photo/Xinhua]

The Jinyan prize, which is the top prize for China's postcards, was also announced during the festival. The Guizhou post office was awarded the Jinyan prize in best organization. One of its staff, Chen Junyan, was awarded the Jinyan prize in best design and innovation because of his designer postcard themed on preventing smoking. During the advertising festival, the Guizhou post office presented many DIY postcards to visitors. Also, the Guizhou post office officially launched the DIY postcards platform during the festival, through which users can put their own photos on postcards and print them in two minutes.