暗度金针

Explanation: Degree: pass "crossing", the transition, the idea was to teach. Lily: Legend has it that a girl named Pearl Cheng, Tanabata Festival, vega gave her a lily, from her embroidery skills to more sophisticated; after the secret because of the analogy. Secretly superb skill to teach. Also, by means behind the scenes deal. 　　Source: See Tang Fengyi child off "about the history of left bundle Gui Yuan." Legend has it that a girl named Pearl Cheng, Tanabata Festival, vega gave her a lily, from her embroidery skills to more sophisticated. 　　Examples: The Government of Japan, have always advocated ~, although still keep our neutrality, not join treaty bodies, but the Japanese such a move, so also do not support this. ★ Caidong Fan "Romance of the Republic of China," sixty-back