Name: Chayaphon Moonsri
Alias: Wanheng Meenayothin Kaiyanghada
Birth Name: Chayaphon Moonsri
Hometown: Bangkok, Thailand
Birthplace: Maha Sarakham, Thailand
Pro Boxer: Record
(Quoted from 
Chayaphon Moonsri; known professionally as Wanheng Menayothin or Wanheng Kaiyanghadaogym is a Thai professional boxer who has held the WBC minimumweight title since 2014.
Menayothin graduated with a Bachelor of Arts from Bangkokthonburi University. Prior to becoming a professional boxer, he was a Muay Thai fighter. He claims an unbeaten record at Lumpinee Stadium. Kaiyanghadaogym took up Muay Thai at 13 and he sustained his family with the money he earned from fighting. He went on to become a Lumpinee champion and a Thai national champion.
Wanheng made his Professional Boxing debut in January 2007. He won the WBC Youth world minimumweight title in his third fight. He later claimed two more secondary titles, with the WBC International Silver title and the WBC International title. In June 2011, Wanheng outpointed former world champion Florante Condes. On May 31, 2013, Menayothin defeated Raul Pusta Jr. by ninth-round technical knockout to retain the WBC International minimumweight title.
On November 6, 2014, Wanheng won his first world title when he defeated defending champion Oswaldo Novoa to win the WBC minimumweight title. Novoa was badly hurt by an overhand punch in the ninth round and he retired in the corner. Wanheng's promoter, Virat Vachirarattanawong, paid $175,000 dollars to host the fight, a rarely high purse for the weight class. In his sixth defense, Wanheng beat Melvin Jerusalem via unanimous decision (115–113, 114–113, 114–113). Two scorecards were swung by a point deduction Jerusalem received after he threw a clear low blow.
On August 29, 2018, Wanheng eclipsed Mayweather, reaching 51–0 with a points win over Pedro Taduran.
- Has defeated 12 opponents (5 by KO) for world title.
- Has a record of 13-2 (5 KOs) in world title fights.
- Has a record of 5-2 (1 KO) against former or current world champions:
Regional & Minor Titles
- WBC International Minimumweight Title (2011-13)
- WBC International Silver Minimumweight Title (2011)
- WBC World Youth Minimumweight Title (2007-09)
- WBC Minimumweight Title (2014-2020 )
| WBC Minimumweight Champion
2014 Nov 6 – 2020 Nov 27