Amendment to Schedule 13D Filing for Niu Technologies

Glory Achievement Fund Limited, Bull Group Limited, and BULL TRUST have filed an amendment to their Schedule 13D filing regarding Niu Technologies. Between February 10, 2026, and March 3, 2026, Glory Achievement Fund Limited purchased an additional 1,062,931 ADSs, representing 2,125,862 Class A ordinary shares, for approximately $3.8 million. These purchases were made for investment purposes. The Reporting Persons intend to regularly review their holdings and may acquire or dispose of additional securities. They hold 37.6% of the Class A ordinary shares. The filing includes a joint filing agreement signed by representatives of each entity.