BELFAST, April 19 (Reuters) - China is aiming for "global technological supremacy" in cyberspace and is using its cyber capabilities to conduct intelligence and surveillance campaigns, Britain's cyber chief said on Wednesday. Lindy Cameron, director of the National Cyber Security Centre (NCSC), part of Britain's GCHQ eavesdropping spy agency, said Britain had a "legitimate concern" about the effects Chinese technology may have on cybersecurity. "China is not only pushing for parity with Western countries, it is aiming for global technological supremacy," Cameron told an annual government cybersecurity conference in Belfast. "Bluntly, we cannot afford not to keep pace with China....