The last stroke of "crow" is to hang the needle vertically, which is mostly used in the middle, but then again, calligraphy pays attention to artistry and is a plastic art. It cannot be said that it is wrong to write it as hanging the needle vertically, so special attention should be paid to it. Chinese class or formal standard writing can be written as hanging needles, but you should know that there is not only one way to write a word, nor is there only one way to write a stroke.
I hope I can help you. Have a good time.