Regional stocks rose on Thursday, powered by Al fervour that pushed South Korea’s SK Hynix to the brink of joining the trillion-dollar club, while the spotlight was firmly on a high-stakes summit between President Xi Jinping and his US counterpart Donald Trump.The benchmark Hang Seng Index opened up 448 points, or 1.7 percent, at 26,836.The China enterprises index was 193 points, or 2.18 percent, up at 9,070 while the tech index was 164 points, or 3.23 percent, higher at 5,258.Up north, the Shanghai Composite Index onened un 13 points or 0 32…