However,in Zhang Xuan s interpretation of Book of Songs and Official Rank System,February(lunar calendar) in the middle of spring should be considered opportune.

The relationship among the Chinese Plum Flower,Spring,snow and people is reflected in this poem and they are thought of the three basic factors to the creation of literature.

Wang Lixian thought"spring"language sourcerighteousness works as is,but non-Xu Shen center pours in"Shuo wen""pushes".

Chinese people have deep emotion towards spring because it implies great and deep history and culture connotation.

Determination of Geniposidic Acid and Chlorogenic Acid in Male Flowers and Related Products of Eucommia ulmoides by Reversed-Phase High Performance Liquid Chromatography;

Isolation of total glycosides and flavonoids from Eucommia ulmoides leaf by macroporous resin;

Browning Control Technology of the Liquid Extract from Eucommia ulmoides Leaves;

In this review with 33 references,recent advances in the synthesis of secondary amine were summarized,including the methods of direct N-alkylation,reductive amination,benzisoxazoles and 2-hydroxybenzaldoximes reduction,three-phase reaction,protection-alkylation-deprotection and asymmetric boronic esters.

Meanwhile the applications of secondary amine,diamine,polyamine and their derivatives were summarized also.

And secondary amine and tertiary amine are also discussed.

Foreign trade and arbitration of int ernational commerce;

Research and Realization based on the identity authenticity of arbitration in real-time verification mechanism;

New constructions of equitable authentication codes with arbitration;