Deadline of Ningbo International Poster Biennial extended to September 10th Deadline of Ningbo International Poster Biennial extended to September 10th, 2006 Deadline of Ningbo International Poster Biennial extended to September 10th, 2006. (Subject to the receiving date) Deadline of International Students Design Competition of Ningbo Poster Biennial is still Otober 20th, 2006. (Subject to the receiving date) See more in www.igdb-ningbo.com. Organizing Committee of the Fourth Ningbo International Poster Biennial.