Google Pinyin has released a new version, and while checking it out, I accidentally discovered this feature, which seems quite useful.
For some obscure characters, you may not know their pinyin. In this case, you can try the stroke input function provided by Google Pinyin. The specific usage method is: press "u" first to enter the stroke input mode, then use the codes h (horizontal), s (vertical), p (flick), n (stroke), z (bend), d (dot) to input each stroke of the character in sequence. Among them,