Pleeeease: Let a hundred flowers bloom

pleeeease tell me what does it mean:

Let a hundred flowers bloom
Thanks for your help

This famous quote from Mao has been co-opted by many other people since. It was a signal by Mao to let the Chinese people engage in political dialog. Thaere are a lot of places on the web to find out more. Here's a link to a clear explanation: www.historylearningsite.co.uk/ china_hundred_flowers.htm