China's GDP grew by 4.8% in Q1 and it's better than expected, but don't relax as yet. Bert Hofman, director of East Asian Institute at the National University of Singapore and former World Bank country director for China, has a warning: There will be more pain ahead. Plus, he believes the zero-COVID-19 policy has helped China recover faster and notch up positive growth when others were in negative territory. But now, it needs a booster shot. Hear him explain why on "The Hub with Wang Guan".