“Silkworm Head & Goose Tail” refer to the start and ending of horizontal strokes typically written in Li Shu. When one has learned this, the other principles of Li Shu are relatively easy as explained in the following videos.
http://www.art-virtue.com/styles/li/index.htm
Chinese calligraphy Clerical Style “Li Shu”
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Duration : 0:5:34
Writing “Peace Love Joy” in cursive and semi-cursive Chinese calligraphy for Katia from Russia during a Chinese music concert of Master Betty Zhang in McKinney Performing Arts Center in Texas. The writing was done on a pre-mounted blank scroll with printed dragons in light gold. Though the pre-mounted blank scroll can sometimes be wrinkled due to handling, the wrinkles can be removed with an iron. Like music performers trying to play correct notes, writing on a pre-mounted scroll can be risky since the Chinese ink cannot be changed. So I humbly asked the audience to understand and be as quiet as possible to avoid any distraction; otherwise, I lose the money and the scroll if a single stroke or any artistic detail has disappointed me.
Chinese calligraphy in Kai Shu: http://www.art-virtue.com/styles/kai/index.htm
Chinese calligraphy characters in different styles compiled in a dictionary.