老方infringe copy right. 就请他上法庭去告好了，如果他不告，就请他不要再诽谤，否则后果自负

According to copyright law, a person may plagiarize another person’s work in several ways. The first is to copy their words without attribution. The second is to use more than a certain percentage of a work without explicit permission from the copyright holder. For example, in the U. S. one may not quote more than 250 words from a single source, even with attribution, without obtaining explicit permission from the copyright holder. I am told that in China, an essayist must not copy more than 3% of a text and that a student who copies more than 25% may be denied his or her degree. A third form of plagiarism consists of lifting another author’s arguments and examples without explicit permission. Accordingly, one may plagiarize a work even in the absence of copying its language and even with attribution, especially if the arguments and examples are unique and constitute a substantial portion of the work plagiarized.