Shownu of Monsta X announced that he will be beginning his mandatory military service soon, and Monsta X fans are tearfully wishing him the best.Prior to joining a K-POP group, Shownu used to be a trainee at JYP Entertainment. He left after sensing no progress in terms of his debut, and eventually joined K-POP soloist Lee Hyori's team as a back-up dancer for her.The 29-year-old eventually hopped over to Starship Entertainment and participated in their survival show No.Mercy. Finding immense success through the show, he was selected and eventually debuted as the leader of Monsta X.Shownu reveals all in a letter; Monsta X fans wish him the bestIn order to reveal the news, Shownu uploaded a personal message onto a fan-interaction platform officially used by Monsta X.210710 FROM MONSTA X[[SHOWNU]] I have something to say[MONSTAX_SHOWNU] pic.twitter.com/WXXSZiW7Yc— ☽ qijae (@booqijae) July 10, 2021He conveys to his fans that he's very thankful for their support and that he will do his best in order to repay the kindness that his has received from them. He is extremely grateful for having the opportunity of being a member of Monsta X, and therefore getting to experience so many wonderful things.Shownu's enlistment will begin on July 22nd.South Korea's mandatory military service: And explanationIn South Korea, once a male turns 18 years of age, it is compulsory for them to complete military service for 18 months. They do not need to start immediately, but they must enlist by the time they reach the age of 28.Recently, a bill was passed amending the Military Service Act of the country; this allowed K-POP stars, with the required level of contribution to South Korea's overall performance, to post-pone their enlistment till the age of 30.Also read: "BTS is 7": Louis Vuitton under fire due to recent promotional video after fans noticed Kim Taehyung's omissionThe move was made after the South Korean government took note of fellow K-POP boy group BTS' influence over the growth of the country's economy and image.Certain exceptions to the military service enlistment are made for those who suffer from health conditions. Shownu, who suffers from a retinal detachment, will not be following the same path as a typical enlister; instead, he will complete a 3 week training program and then operate as a social worker until the end of his service.Fans share tearful goodbyes and light-hearted memes to show support and brighten the moodMonsta X fans (a.k.a Monbebes) were shocked at the sudden announcement but quickly recouped to send Shownu supportive messages and post light-hearted jokes in order to cheer each another up.Also read: Penthouse 3: War in Life episode 6 - Seo-jin saved Logan with Mr. Baek’s help, but killed Yoon-huiMany joked about Shownu meeting fellow K-POP star Taemin (of SHINee) during his enlistment, as the former looks up to the latter.His letter actually broke me into a million pieces ……. I know it’s just a military service but god I am so freaking sad right now…. Shownu I will miss you dearly….. please stay healthy during your military service. We will wait for your return……. @OfficialMonstaX— Ksu 🐹♡̆̈🐝 One of a kind🎲 (@KsuBebe27) July 10, 2021"did it hurt reading Shownu's letter?" pic.twitter.com/b4aH1stbg8— 원호's luck ⋈ (@luckmxu) July 10, 2021shownu trying to impress taemin in the barracks pic.twitter.com/k7YwzGqDSu— laoise (@changkyunIuv) July 10, 2021the evidence that shownu has already served: pic.twitter.com/kzSJ3Dtb5g— kaye 🍡 #1 HANNAH PROTECTOR (@louvkiki) July 10, 2021shownu already e word idk what yall talking about look i have photographic evidence 🤥 pic.twitter.com/tNMhkWv7yz— koru 🍙 (@DILFSHOWHO) July 10, 2021taemin to shownu when he eats all the food in the bunk: pic.twitter.com/8JJmOUCoTK— ky - san day ! ⚛︎ (@fatalbebe) July 10, 2021the barracks : shoo-shownu : pic.twitter.com/72xwkLnvdg— laoise (@changkyunIuv) July 10, 2021shownu after performing shootout choreography for the soldiers for the 373737th time: pic.twitter.com/6jmEmJJDHi— ky - san day ! ⚛︎ (@fatalbebe) July 10, 2021All I want is shownu to enlist healthily and safely, we will definitely wait for him to come back to us 🤍@OfficialMonstaXpic.twitter.com/1hEzDDRhxy— Butter Chickyun (@RamenhaeMXMB) July 10, 2021Shownu was the father of 6 children for almost 7 years, he take good care of them for whole time, now he's going to serve the country and leave them for us, we Monbebe need to take care of them like Shownu did. SHOWNU, i promise, we won't let you down, we are gonna be good dad.— Doki. 🎲 (@DokiMBB) July 10, 2021Shownu at the dorms saying goodbye on July 22nd pic.twitter.com/0YG48yCFQ6— wonho’s burner account (@actlikehoseok) July 10, 2021All of the sudden I remind myself about Nunu running away and PD and writers sending actual search party after him I seriously can't stop laughing #SHOWNU #MONSTAX WE WILL WAIT FOR SHOWNU pic.twitter.com/FVNC95sCWk— 🎲GAMBLER🎲 ONE OF A KIND (@stacha5678) July 10, 2021me to the person i will become because shownu is going to enlist pic.twitter.com/CXpOl26SMR— 🌈 (@COOLOVED) July 10, 2021Prior to this announcement, Shownu had announced his withdrawal from Monsta X's "One of a Kind" promotions in May 2021, due to his retinal injury.Also read: JYJ's Kim Jaejoong makes his first Korean music show appearance after 10 years of being blacklisted