https://www.soompi.com/article/1242801wpp/jeong-jinwoon-talks-cameo-30-17
2AM's Jeong Jinwoon brought up his cameo in "30 but 17." On October 9, he guested on SBS Radio Power FM's "Choi Hwa Jung's Power Time" alongside Girls'
jeong jinwoontalkscameo
https://www.soompi.com/article/365201wpp/jinwoon-releases-jinwoons-diary-4-free-dl-for-new-song
Another famous people working with Jin Woon and new song title reveal.
jinwoonreleasesdiaryfreedl