Do I need a guardian to accompany me to apply for a card after filling in the agent information online?

According to the relevant information of official website, applicants over the age of 16 and under the age of 18 can go to the bank directly with their ID cards without being accompanied by a guardian. /kloc-under 0/6 years old, accompanied by a guardian, who must carry an ID card and go through the formalities according to the regulations. For details, you can inquire/consult the local authorities to obtain first-hand information.