One Diamond Bidding System
Bidding card: 1C open, artificial 17-21pts, 1D response, artificial 0-7 pts; 1D open, artificial,no 5 card majors, 12-16 pts, 1H response, artificial 0-7 pts); 1H/S 12-16pts, 5 cards; 1NT:15-17pts,balance hand, can have one 5 card minor; 2NT:20-21pts; 3NT:25-27; 2C open, artificial >= 22pts, 2D response, artificial 0-4 pts; 2D/H/S weak open,5-11pts,6 card suit, 2NT Ogust Responses; 3C/D/H/S weak open, 6-10pts, 7 card suit; Slam: Blackwood & Five Keycard A Asking System; No-trump: Stayman, weak (0-7pts) transfers, 4NT,5NT: Quantitative; Splinter Bids, singleton or void; Cue bids, first round control, then second round control; Unusual 2NT：>=10pts, two lower suits; Signals, 1)suit trump, big card welcome, 2) no-trump, small card welcome, 3)trump, after void, use hi-hi, lo-lo signal; 4)for no-trump indicating lead double, lead next opponent bidding suit, if bidded two suits, lead second suit.