*形形色色的双飞燕序 II*
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Primary Sequence 2, White 2 hasami (ハサミ or 夹) , Black 3 double-pincer creates sparrow attack, when White 4 presses, Black 5 hit san-san (三々 or 三三), this is Korean’s favourite joseki, it is one of the famous joseki in Go world now, what is the expected follow-up?