Exhibit 99.1

CUSIP No. 16954L105

13D

Page 1 of 3 Pages

exhibit A

Agreement of Joint Filing

The undersigned hereby agree that a single Schedule 13D (or any amendment thereto) relating to the Ordinary Shares and ADSs of 51 Talk Online Education Group shall be filed on behalf of each of the undersigned and that this Agreement shall be filed as an exhibit to such Schedule 13D.

Date: May 7, 2025

	DCM Ventures China Turbo Fund, L.P.

	By: DCM Turbo Fund Investment Management, L.P.
	Its General Partner

	By: DCM Turbo Fund International, Ltd.
	Its General Partner

	By:	/s/ Matthew C. Bonner
		Matthew C. Bonner, Attorney-In-Fact*

	DCM Ventures China Turbo Affiliates Fund, L.P.

	By: DCM Turbo Fund Investment Management, L.P.
	Its General Partner

	By: DCM Turbo Fund International, Ltd.
	Its General Partner

	By:	/s/ Matthew C. Bonner
		Matthew C. Bonner, Attorney-In-Fact*

	DCM Turbo Fund INVESTMENT MANAGEMENT, L.P.

	By: DCM Turbo Fund International, Ltd.
	Its General Partner

	By:	/s/ Matthew C. Bonner
		Matthew C. Bonner, Attorney-In-Fact*

CUSIP No. 16954L105

13D

Page 2 of 3 Pages

	DCM Turbo Fund International, Ltd.

	By:	/s/ Matthew C. Bonner
		Matthew C. Bonner, Attorney-In-Fact*

	DCM HYBRID RMB FUND, L.P.

	By: DCM HYBRID RMB FUND INVESTMENT MANAGEMENT, L.P.
	Its General Partner

	By: DCM HYBRID RMB FUND INTERNATIONAL, LTD.
	Its General Partner

	By:	/s/ Matthew C. Bonner
		Matthew C. Bonner, Attorney-In-Fact*

	DCM HYBRID RMB FUND INVESTMENT MANAGEMENT, L.P.

	By: DCM HYBRID RMB FUND INTERNATIONAL, LTD.
	Its General Partner

	By:	/s/ Matthew C. Bonner
		Matthew C. Bonner, Attorney-In-Fact*

	DCM HYBRID RMB FUND INTERNATIONAL, LTD.

	By:	/s/ Matthew C. Bonner
		Matthew C. Bonner, Attorney-In-Fact*

	F. HURST LIN

	/s/ F. Hurst Lin
	Matthew C. Bonner, Attorney-In-Fact*

	MATTHEW C. BONNER

	/s/ Matthew C. Bonner
	Matthew C. Bonner

CUSIP No. 16954L105

13D

Page 3 of 3 Pages

	ANDRE G. LEVI

	/s/ Andre G. Levi
	Matthew C. Bonner, Attorney-In-Fact*

* Signed pursuant to a Power of Attorney already on file with the appropriate agencies.

51Talk Online Education Group SCHEDULE 13D/A