Abstract: A method for producing a fluoropolymer which method includes polymerizing a perfluoromonomer in an aqueous medium in the presence of a polymer (1) to obtain a fluoropolymer, wherein the content of a polymerized unit derived from the perfluoromonomer in the fluoropolymer is 90 mol % or more based on all polymerized units of the fluoropolymer, the polymer (1) is a polymer of a monomer (1) represented by the general formula (1): CF2?CF—O—R-(Rf-SO3M)m, a polymerized unit (1) derived from the monomer (1) in the polymer (1) is 50% by mass or more based on all polymerized units of the polymer (1), and the content of a dimer and a trimer of the monomer (1) in the polymer (1) is 1.0% by mass or less based on the polymer (1).

Abstract: A system providing effective adjustment of an advertising volume is disclosed. Upon receiving use information indicating that advertising information has been used in a terminal device from the terminal device, a variable parameter corresponding to an electronic commodity with which the advertising information is associated on the terminal device and/or a variable parameter corresponding to an electronic commodity as information included in the advertising information is updated and then the advertising information associated with the electronic commodity to be transmitted is controlled on the basis of the variable parameters after the updating.