chun1 can be broken up into where the first component is a non-character that denotes 'to receive' and the second is ri4 meaning 'sun' (original hieroglyph being ). Spring is the time when the sun's warmth is received again.
qing1chun1 means 'youth' and literally translates as 'green'-'spring'.
qing1 is composed of meaning 'comparable to' and 'moon' respectively. The moon with its clear light hue is a symbol of youth.
chun1juan3 means 'spring roll'.
juan3 can be broken down into meaning 'wrap up' and 'from top' respectively.