Hong Kong stocks rebounded to start the week in green after staying in red for multiple consecutive sessions as a Caixin report showed more than expected growth in China's manufacturing sector last month despite the contracting official data.

The Hang Seng Index rose by 1.79%, or 323.43 points, to close Monday's session at 18,403.04. The Hang Seng China Enterprises Index rose by 2.18%, or 139.41 points, to close Monday's session at 6,531.99.

Hong Kong's total retail sales slid 14.7% year over year to HK$29.6 billion in April, according to provisional data from the city's Census and Statistics Department released Friday with the rate of decline in April being faster compared with the 7% fall in March.

In corporate news, UBoT Holding Group (HKG:8529) made a stellar trading debut in Hong Kong Monday morning, opening at HK$0.660 per share, well above its IPO price of HK$0.500. The back-end semiconductor transport media manufacturer's shares closed at HK$0.53, or 6% higher, on Monday.

Jacobio Pharmaceuticals (HKG:1167) presented the safety and efficiency data of Glecirasib, or JAB-21822, combined with JAB-3312 for frontline non-small cell lung cancer patients with a KRAS G12C mutation during the 2024 American Society of Clinical Oncology meeting. The company shares rose nearly 12% on Monday's close.

GenScript Biotech (HKG:1548) received information that two members of the US Congress had sent a letter on May 30, to the Federal Bureau of Investigation and the Office of the Director of National Intelligence to seek information about the company. The company's shares fell by nearly 18% on Monday's close.