0503.HK Lansen Pharma (HKSE) up 40.94% pre-market 21 Mar 2026: Watch volume

0503.HK stock surged in Hong Kong pre-market trade on 21 Mar 2026, rising to HKD 1.79 after opening at HKD 1.46 as volume spiked to 13,959,137.00 shares. We see this as a high-volume mover on the HKSE driven by short-term buying interest and technical breakouts. This report connects the volume surge to company fundamentals, sector context and a model forecast so investors can see what may follow next.