My answer was not accurate enough. According to my knowledge of online literature, there is no description or mention of a 70-year-old woman named "Kang Kang". You might have remembered the name or the plot wrongly. If you can provide more information, I will try my best to answer your questions.
Yes, Shen Teng sang the song " Ordinary Road." The song was written by Pu Shu and Han Han, and composed by Pu Shu. It was released on February 1, 2019. It was originally a special edition song from the movie "Flying Life" and later included in Shen Teng's album "Ordinary Road". The song was 03 minutes and 09 seconds long.
The songs sung in " Flying Life " included " I Really Love You,"" Under the Lion Rock,"" Glorious Years,"" Dedication,"" Half Life,"" Flying Life,"" Ordinary Road," and " How Are You, Big Brother?"
Tan Jianci sang many songs, including " Walking on the Road of Life,"" I Want Us to Be Together,"" Mona Lisa,"" Enchanted,"" Earth Warrior,"" Fly Away," and " Immagetit."
Wang Hedi's songs included " Take You on a Journey,"" Break Up,"" People Like Me,"" Don't Even Think About It,"" Never Thought of It,"" For You,"" Create Memories,"" Miss Me,"" Tango by the Sea,"" Miss You,"" Stars Count Meteors,"" Chongqing Dexing,"" Secret Love," and so on.