First double then bid its suit 1♠, 1♠ says " rebiddable ♠,18+TPs".
- Second sequence.
First double,then jump bid its suit 3♠, 3♠ says " twice rebiddable♠, 17+TPs".
- Third sequence
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Meanwhile, I found a interesting matter.
First double, then bid its suit 2♠, 2♠ says " rebiddable ♠,21+TPs".
First double then bid its 2♠ and 3♠ respectively, which is far more strong? It turns out that jump 3♠ is weaker than 2♠.