Du Ying plan to sell securities of Zai Lab Ltd under Form 144

Du Ying filed Form 144 to notify SEC of plan to sell 50000 units of Zai Lab Ltd securities around 2026-05-13, with aggregate market value of $960,000.00. The total outstanding units is 340336080.0. The amount planned to be sold represents 0.01% of total outstanding units; Recent transactions in past 3 months include: On 03/04/2026, sold 50000 units for $958155.00; On 03/05/2026, sold 50000 units for $961055.00; On 03/06/2026, sold 50000 units for $970935.00; On 03/09/2026, sold 50000 units for $951465.00; On 03/11/2026, sold 1067 units for $20362.09; On 04/02/2026, sold 5576 units for $113695.19; On 04/06/2026, sold 2653 units for $54249.87;