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The author Shu SHANG provides the content of these web pages, such as posts, pictures and codes under a Creative Commons Attribution-Noncommercial License. This means that the content can be used freely, but only if credit is given to the author, and not for commercial purpose. If you want to use the content for any different purpose, please leave a message or send an email to the author. Furthermore, the author does not make any warranties for the corretness and completeness of the information on these pages. The contents of any external links on this website are subject to the original author.