SCHEDULE 13D/A

China Online Education Group

American Depositary Shares (ADS), each representing Sixty Class A Ordinary Shares, par value $0.0001 per share · CUSIP: 16954L105

Event date: 2025-04-25

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• DCM Ventures China Turbo Fund, L.P. ("Turbo Fund")Reported CIK 0001618486

  Shares: 10,017,832.00 · Class: 4.1%

• DCM Ventures China Turbo Affiliates Fund, L.P. ("Turbo Affiliates Fund")Reported CIK 0001626936

  Shares: 589,278.00 · Class: 0.2%

• DCM Turbo Fund Investment Management, L.P. ("Turbo Fund DGP")Reported CIK 0001618485

  Shares: 10,607,110.00 · Class: 4.3%

• DCM Turbo Fund International, Ltd. ("Turbo Fund UGP")Reported CIK 0001618483

  Shares: 10,607,110.00 · Class: 4.3%

• DCM Hybrid RMB Fund, L.P. ("Hybrid Fund")Reported CIK 0001522543

  Shares: 57,681,212.00 · Class: 18.9%

• DCM Hybrid RMB Fund Investment Management, L.P. ("Hybrid Fund DGP")Reported CIK 0001570799

  Shares: 57,681,212.00 · Class: 18.9%

• DCM Hybrid RMB Fund International, Ltd. ("Hybrid Fund UGP")Reported CIK 0001570782

  Shares: 57,681,212.00 · Class: 18.9%

• Matthew C. Bonner ("Bonner")Reported CIK 0002001775

  Shares: 68,288,322.00 · Class: 22.4%

• F. Hurst Lin ("Lin")Reported CIK 0002002613

  Shares: 68,288,322.00 · Class: 22.4%

• Andre G. Levi ("Levi")

  Shares: 68,288,322.00 · Class: 22.4%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.