This phone number 4007895555 is indeed the insurance marketing outbound number of China Merchants Bank Credit Card Center. You can also call the Credit Card Center yourself to confirm.
It is recommended that you do not disclose personal information easily to prevent phone scams when you are not sure whether the calling number belongs to the bank. If you are interested in a product that is called to you by an outbound call, you can hang up and then call the bank's official customer service hotline. Generally, you can handle the products sold through outbound calls if you take the initiative to call in.