What is the role of Zeng Yi in the Phoenix Legends group?

Phoenix Legend has been on fire for more than a decade, from the official name change signing in 2004, 2005 won the annual runner-up of the Avenue of Stars, "Above the Moon", "Lotus Pond Moonlight", "the most dazzling national winds" and other well-known tracks, almost dominated all the cell phone ringtones, square dance soundtracks, the streets and lanes at all times ubiquitous. Really let you experience the feeling of being dominated by the Phoenix Legend Divine Comedy! Each song is Linghua and Zeng Yi's cooperation, and Zeng Yi's "role" is always so little, I have had the same idea, I feel that Zeng Yi can be dispensable, and then listened to a song sung by Linghua solo, although Linghua's voice is really good, but it always feels strange, and then understand that the Phoenix Legends less Zeng Yi's rap that is not the Phoenix Legends, the Phoenix Legends are two people, and the Phoenix Legends are two people. Legendary, Phoenix Legend is two people, only two people with only people like the "Divine Comedy" combination!