(1) emancipate children's minds from superstition, prejudice, misinterpretation and fantasy; (2) Emancipate the child's hands and give the child a chance to start work;
(3) Liberate children's mouths and give them the freedom to speak, especially allowing them to ask questions;
(4) Liberating children's space and letting them contact with nature and society;
(5) Free children's time, give children time for their own study and activities, give children some free time to digest what they have learned, learn something they are eager to learn, and do something they are willing to do.