CHU [CHINA UNICOM (HONG KONG)] SC 13D/A: CUSIP No. 16945R 10 4 13D 1. NAME
[CUSIP No. 16945R 10 4 13D 1. NAME OF REPORTING PERSON TELEFÓNICA, S.A. 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP x ¨ (a) 3. SEC USE ONLY 4. SOURCE OF FUNDS [WC] 5. ¨ OR 2(e) 6. CITIZENSHIP OR PLACE OF ORGANIZATION THE KINGDOM OF SPAIN NUMBER OF SHARES BENEFICIALLY]