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China essence is made definitely, first-order tall flower opens the development
From;    Author:Stand originally

Reach 1S-2S in 1H-2H after increasing one support, the person that return a card is added namely allocate a dot to also do not cross 10 to nod at most, calculate calling a person is highest be restricted left at 15 o'clock cry, two people also are nodded 25 times nevertheless- - vulnerable force, accordingly, the focal point that we debate makes a way in vulnerable.

Normally, unless be a card,call a person force highest be restricted and card very beautiful, after increasing one support, can call outside directly, otherwise, if have same requirement only, (be restricted high or card good) , must winding card person also is tall be restricted or force as it happens can cooperate, just can have vulnerable opportunity. Accordingly, if think to have,call a person when the bureau is likely, can invite only normally the person that return a card cooperates or tall in a limited time go up.

Invitation method has 3 kinds:
(1) short door invites.
(2) long door invites.
(3) invite directly.
Alleged short door invites it is the design and color that calls a person to call his short door (odd Zhang Huo person gap) , although some go up in this,inviting force of the person that return a card not to grow is cry when useful particle power however bureau. Growing the door to invite is to make grow the door, be in this or inviting force of the person that return a card to grow is become to when this some king have value, crying bureau. Do not have long door already and short door and it is highest can inviting the person that return a card what be restricted directly at 15 o'clock also is highest be restricted cry when 10 o'clock bureau.

We set calling a person to call a design and color directly is short door to invite: After 1S-2S, open the short door that calling a person to call 3C, 3D, 3H is short door of wintersweet, diamonds, hearts respectively to invite. And after 1H-2H, open the short door that calling a person to call 2NT, 3C, 3D is short door of spade, wintersweet, diamonds respectively to invite.

Opening the design and color that calls a person to pass the procedures that changes together to cry again first to express is long door: After 1S-2S, call a person to call 2NT first, this does not have natural meaning, just making the preparation that long door invites, want to answer card person to call 3C namely, leave next calling a person to call 3D, 3H, 3S to express diamonds, hearts, wintersweet respectively again is long door. And after 1H-2H, leave calling a person to call 2S again is to should answer card person to call 2NT likewise, open the long door that calling a person to call 3C, 3H, 3H again is long door of wintersweet, diamonds, spade respectively to invite next, alleged long door, should be the card group of 4 pieces of above normally.
After 1H-2H and 1S-2S, leave calling a person to call 3H or 3S directly is to invite directly. The card of the 5-3-3-2 that was at 15 o'clock normally or 6-3-2-2, invite the person that return a card tall in a limited time cry bureau.
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