The third song (with in French and Chinese) is a type of music very popular in 1980-2000 (but it still have lots of fans in nowadays), I think it is different to the pop song, total different to traditional music. I find an intro here
"Chinese folk songs are not a musical definition, but more inclined to a sociological definition. It can be roughly considered that folk songs are popular music or commercial music. It is a musical work that is widely spread among the people, with entertainment and commerciality as its main characteristics. It is different from music works created for the purpose of pursuing elegant artistic experience and limited to groups with certain musical accomplishments. The characteristics of folk songs determine its wide audience, and it also allows many people to fully enjoy the beautiful experience brought by music without any knowledge of music theory, so it can be widely spread. This is also the advantage of folk songs."
It also developed a sub-type called "Campus folks", here is an intro:
"Campus folk songs, as the name suggests, are widely loved by students, popular on campus, and reflect the campus life and students' state of mind or feelings. They may be called "campus songs", "modern folk songs", "Yuefu folk customs" and so on. Campus folk songs are full of vigor and full of campus taste, without any pretense, they are completely outspoken and outspoken, and they sound very touching. Poetic and romantic, its style is generally simple, bright, positive and full of vitality, and is deeply loved and sung by people. Campus folk songs belong to a special phenomenon in the field of music. Its production is related to the popularity of mainland original music and the influence of foreign music. Among the influences of foreign music, Taiwanese campus songs have the most direct and far-reaching influence; among mainland original music, rock music (represented by Cui Jian) has a greater impact on the production of campus songs. In addition, European and American pop music and Chinese folk music have a certain influence on the production of campus folk songs."