DL [China Distance Education] SC 13D/A: CUSIP No. 16944W104 1. Names of reporting persons.
[CUSIP No. 16944W104 1. Names of reporting persons. Zhengdong Zhu 2. Check the appropriate box if a member of a group (see instructions) ¨ x (a) 3. SEC use only 4. Source of funds (see instructions) OO 5. ¨]