To retain one's youthful vigor; to have eternal youth. Also written as [[永保青春|永保青春|yong3 bao3 qing1 chun1]].

Shen Baozhen (1820-1879), a prominent Qing dynasty official and Minister of the Navy who founded the [[船政学堂|船政學堂|chuan2 zheng4 xue2 tang2]] in 1866 and oversaw modernizing defenses in Taiwan.

to keep or maintain something permanently; to preserve forever

shaded, softened, or concealed light

(literary) to maintain one's original innocence or nature; to be untarnished by worldly desires

(topolect) luxuriant; describes the appearance of dense and healthy plant growth