X0202 SCHEDULE 13G/A 0001213900-25-013756 0002056465 XXXXXXXX LIVE 1 Ordinary shares, par value US$0.00001428571428 per share 06/30/2026 0001967631 Jinxin Technology Holding Co 47760D102 SHENGYIN BUILDING, SHENGXIA ROAD 666 BUILDING D, FLOOR 8 PUDONG DISTRICT, SHANGHAI F4 201203 Rule 13d-1(d) WU CAPITAL LTD D8 153552600 0 153552600 0 153552600 N 10.79 CO (1) For Rows 5, 7 and 9: represents 153,552,600 ordinary shares directly held by Wu Capital Limited, a British Virgin Islands company in which Ms. Xinyi Cai beneficially owns 100% of the equity interests through a trust for which she acts as the settlor. (2) For Row 11: Percentage calculations based on 1,423,285,396 ordinary shares outstanding as of December 31, 2025 (including those represented by American Depositary Shares), as disclosed in the Issuer's report on Form 20-F furnished to the Securities and Exchange Commission on April 28, 2026. The CUSIP number applies to the Issuer's American Depositary Shares ("ADSs"). Each ADS represents the right to receive 450 ordinary shares. Xinyi Cai K3 153552600 0 153552600 0 153552600 N 10.79 IN 1) For Rows 5, 7 and 9: represents 153,552,600 ordinary shares directly held by Wu Capital Limited, a British Virgin Islands company in which Ms. Xinyi Cai beneficially owns 100% of the equity interests through a trust for which she acts as the settlor. (2) For Row 11: Percentage calculations based on 1,423,285,396 ordinary shares outstanding as of December 31, 2025 (including those represented by American Depositary Shares), as disclosed in the Issuer's report on Form 20-F furnished to the Securities and Exchange Commission on April 28, 2026. The CUSIP number applies to the Issuer's American Depositary Shares ("ADSs"). Each ADS represents the right to receive 450 ordinary shares. Jinxin Technology Holding Co SHENGYIN BUILDING, SHENGXIA ROAD 666, BUILDING D, FLOOR 8, PUDONG DISTRICT, SHANGHAI, CHINA 201203 Wu Capital Limited Xinyi Cai Wu Capital Limited: Palm Grove House, P.O. Box 438, Road Town, Tortola, British Virgin Islands Xinyi Cai: Flat A, 22/F, Tower 2, Regence Royale, 2 Bowen Road, Hong Kong Wu Capital Limited - VIRGIN ISLANDS, BRITISH Xinyi Cai - HONG KONG Y Wu Capital Limited: 153,552,600 Xinyi Cai: 153,552,600 Represents 153,552,600 ordinary shares directly held by Wu Capital Limited, a British Virgin Islands company in which Ms. Xinyi Cai beneficially owns 100% of the equity interests through a trust for which she acts as the settlor. 10.79 Wu Capital Limited - 153,552,600 Xinyi Cai - 153,552,600 Wu Capital Limited - 0 Xinyi Cai - 0 Wu Capital Limited - 153,552,600 Xinyi Cai - 153,552,600 Wu Capital Limited - 0 Xinyi Cai - 0 Y Y Y Y Y Y Exhibit 1 Joint Filing Agreement WU CAPITAL LTD /s/ Xinyi Cai 08/06/2026 Xinyi Cai /s/ Xinyi Cai 08/06/2026