News At Seven-Thirty highlights: caustic liquid was dropped into a busy pedestrian zone in Mongkok; new surge of "forced shopping" complaints by visitors to Hong Kong; HK government’s new economic relief measures aim at helping businesses and individuals; health officials warned HK will have her first locally-contracted H1N1 case; Sri Lanka troops took control of the country's entire coastline; Indian Prime Minister declared victory for his left-of-centre coalition in national elections; Obama announced plans to revamp and restart Bush-era tribunals; Utah Governor Jon Huntsman may be the next U.S. ambassador to China; legislators say HK's logistics industry needs to speed up its development; Noah's Ark theme park on Man Wan was unveiled.