The cases of copyright infringement and unfair competition between Sohu and Sina, two major Internet portals in China, involve the ownership and infringement determination of 72 mobile phone pictures and 7 articles, as well as the damage determination of competitors' business reputation, which has aroused widespread concern in society, involving complex legal relations and abundant evidence. The trial alone lasted for three days, and the workload was very heavy. As the undertaker, Comrade Jiang Ying carefully read more than 20 volumes of case files, carefully studied the case, and put forward reasonable and well-founded solutions, which enabled the case to be successfully detected and widely reported by major media in Beijing. In the first dispute case of confirming the non-infringement of "Peter Rabbit" trademark right, she visited the relevant departments of the Industrial and Commercial Bureau and the Trademark Office for many times, consulted relevant experts and consulted a lot of information. After studying with the collegial panel for many times, in the absence of legal provisions, she first clarified the preconditions for filing a non-infringement lawsuit in the form of precedent. In the case of Qin Shaoyin v. Beijing Rongbao Auction Co., Ltd., she creatively put forward the principle that using works for auction without the author's permission does not constitute copyright infringement.