[HK stocks reach six-week high with gains in Meituan, Alibaba as Shanghai prepares to exit lockdown] Hong Kong stocks climbed to a six-week high after Shanghai unveiled a 50-point plan to exit from a citywide lockdown as Covid-19 cases fell, fuelling recovery hopes. Meituan jumped before its earnings report this week. The Hang Seng Index gained 2.1 per cent to 21,123.93 at the close of Monday trading, the highest level since April 14. The Tech Index surged 3.9 per cent. The gains helped erase the loss this month in the main index, and reduce the tech slide to 2.7 per…