CCB Credit Card sends a registered letter from Shanghai (except Shenzhen, Dalian and some special cards), which can be received about 10 days after sending.
In addition, after receiving the card-sending SMS, the landlord is advised to pay attention to the sending situation on the Internet at any time (Baidu search "registered letter tracking inquiry system" is specially used for postal inquiry of registered letters). If you go to the local post office, it is recommended to arrange someone to sign at the card receiving address (if no one signs for many times, it may be returned to Shanghai). Of course, you can also consider taking your ID card and this registered letter code to the post office to collect it yourself, so that you feel more reliable.