外国人签证逾期则构成非法居留。
If the visa is expired, it will constitute illegal residence。
非法居留的认定
Identification of illegal residence
外籍宝宝出生后,如果想在中国长期生活读书,就必须持有有效的身份证件。
After the birth of a foreign baby, if he/she wants to live and study in China for a long time, he/she must hold a valid identity card.