| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Gao Huyun | Chief Operating Officer, 10%+ Owner | BUILDING 11, 8TH FLOOR, NO. 6 BEITANGHE EAST ROAD, CHANGZHOU, CHINA | /s/ Gao Huyun | 17 Mar 2026 | 0002056525 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | STAK | Class B Ordinary Shares | 1,500,000 | 17 Mar 2026 | By MT. Yang Holding Ltd. | F1 |
| Id | Content |
|---|---|
| F1 | The reported securities are directly held by MT. Yang Holding Ltd. The reporting person beneficially owns securities though her 100% shareholding of MT. Yang Holding Ltd. |