The people in the hotel used my WeChat to help me operate the gold card. Can you believe it? Will it be used to install a back door or something?

Personally, if you want to apply for a gold card, you can do it yourself, let the hotel staff guide you, and let you know more about your mobile phone account. If you give your mobile phone directly to others and give it to others through WeChat, you will not rule out security risks. Although this probability is relatively small, it is not uncommon for people to steal credit cards in society now, so in order to avoid unnecessary trouble, it is recommended that you do it yourself.