Boards from Yeh's Cup - Flash Foresight

The 1st board on the second half of the semi-final. NS bid to the grand slam powerfully. What is your lead?

葉氏盃牌局分享－洞燭機先

葉氏盃全國大賽四強下半第一牌，南北方一路氣勢磅礡的叫到大滿貫，在 18 IMP 的領先下實在是不樂見如此大牌。你坐在西家，首攻什麼？