SummaryCompaniesFirm plans Shanghai IPO in first quarter of 2026Targets valuation of $42 billionAims to raise funding of 20 billion to 40 billion yuanIPO aids China's semiconductor efforts amid US trade curbsBEIJING/SINGAPORE, Oct 21 (Reuters) - Chinese memory chipmaker ChangXin Memory Technologies (CXMT) plans an initial public offer in Shanghai as soon as the first quarter of next year, eyeing a valuation of up to 300 billion yuan ($42.12 billion), two sources briefed on the matter said.Founde...