A new semester has just started and a number of parents are registering to change their children's names, in the hope that it will change their temper or help their children drop bad habits, like addiction to the Internet.     One mother surnamed Shi renamed her son, a primary school student, Hengfu, which means eternal happiness in Chinese. She decided to change the boy's name because he always did poorly in study. She has had him tutored after school, but he always earns low marks in school. So Shi turned to a name-giving master. "I hope the special recipe could bring him good luck," the mother said. Teachers in the city say a few students in every school, most nearing graduation, change their names at the start of every new semester.     A naming agency said it has found names for nearly 1,000 students since setting up the shop in 1998. The store said its professionals analyzed the defects   of a person's original name, and suggested a new one based on the person's birthday and other fortune-telling skills.     Buying a new name costs between 800 yuan and 10,000 yuan. Parents also have to register the name at the local police department for a small fee. This will legally change their child's name on all documents, including ID cards and passports. Hu Jie, a university student who changed her name in her final year of high school, said the new name confused her. "I always had no idea who my classmates were calling when they used my new name," Hu said, adding that she wished she had kept her old name. But parents may be ignoring one thing: name changes might encourage kids to believe that fate is more important than their own efforts. From the passage, we learn that   _  .
students are very satisfied with their names being changed name changes may have a bad effect on the development of children naming agencies change the names of children by scientific evidence to register the new name at the police department is usually free of charge