Which of the following statements is true about the patent family of the same family?

Patent of the same family refers to a group of patent documents with the same or basically the same contents that have been applied for, published or approved by patent organizations in different countries or regions for many times based on the same priority document. Sometimes, some people will extend this concept to include patent documents produced by all related patent applications for the same technology, such as the artificial patent family mentioned below. However, this is easily confused with the concept of patent cluster. A group of patent documents linked by at least one * * * is called a patent family. Each patent document in the same patent family is called a member of the patent family, and each patent in the same patent family is a patent of the same patent family. The patent document with the earliest priority in the same patent family is called basic patent.