Regular expression taken from the following tutorial: https://andrewwoods.net/blog/2018/name-validation-regex/ I added the first part of the expression (?!.*[@\.\_\d]) in order to not allow @ . _ and numbers cause I discovered a little weakness on the original expression. Thanks to Andrew Woods

Regexp based on https://en.wikipedia.org/wiki/Email_address criteria.

段落匹配

A string is said to be a correct sentence if it starts with the capital letter and ends with a full stop