YYYYMMDD YYYY-MM-DD YYYY.MM.DD YYYY/MM/DD YYYY-M-D YYYY.M.D...

An invoice number always has 10 digits, starting with a '9' (e.g. '9400065741'). But a number should also be found if it contains white-spaces. These numbers should also be found: '9400065741' ' 94 00065741'...

(?=\w{5,})(?=\D*\d{2}$)

中文英文匹配规则

^(\/\/)(?![\ ])(\w)*