Updated at 6.48pm, Wednesday: Mainland portal www.cnmaya.com , partly controlled by Hong Kong tycoon Li Ka-shing's Tom.com, has vowed to ''fight to the end'' the cybersquatting claims by the US cable TV giant Cable Network News (CNN), official media reported on Wednesday. The official news agency China News Service reported that the CNN has sent a legal letter to the mainland portal, asking Maya to stop using its domain name www.cnnews.com before October 16 or face legal action. Maya provides Chinese-language news items under the domain name www.cnnews.com . The firm rejected CNN's claims. Assistant general manager of Maya online, Sun Jiwei said cnnews stood for China news and had nothing to do with www.cnn.com or CNN, according to the agency.? www.cnnews.com is the news channel of Internet portal www.cnmaya.com , which is co-funded by Maya Online, Tom.com and an IT firm owned by the Shanghai Municipal Government. According to the CNN's legal letter, the legal firm representing CNN said Maya's www.cnnews.com ? ''infringes and dilutes our client's rights in the CNN mark in violation of..?the Federal Lanham Act''. The letter said that CNN adopted the service mark CNN in 1980 to identify its electronic news and information services. It said the United States Patent & Trademark Office (USPTO) has granted CNN numerous registrations for marks containing the term ''CNN''. The letter said CNN made its worldwide news services available in a number of languages and the content appearing on the CNN.com website was accessible in Chinese as well. It said the www.cnnews.com was posting competitive Chinese-language news content on its Web site. ? The letter said if Maya failed to respond, CNN would pursue all available remedies under the Anticybersquatting Consumer Protect Act and has filed the lawsuit in the US. The China News Service quoted mainland Internet legal experts saying that the claims made by CNN were ''ill founded''.? A senior judge in charge of Intellectual Property under the Beijing High People's Court, Cheng Yongshun, said Maya appeared to have convincing reasons to defend its domain name. ? The mainland experts attributed the dispute to CNN's misunderstand of the meaning ''cnnews''.