I was sure he was really scratched with that needle, but looking back at the chapter where he's threatened with it ( http://www.mangago.zone/read-manga/19_days/bt/manga/19_days/c184/pg-9/), the needle is held on his right side, whereas the marks are always on the left side of his neck. So either Old Xian made a mistake or that princess She Li also scratched him with his nails :D
You're half right xD I re-checked and in chapter 188 the mark is actually on the right, but in the chapters before that it's on the left, e.g. http://www.mangago.zone/read-manga/19_days/bt/manga/19_days/c186/pg-7/ or http://www.mangago.zone/read-manga/19_days/bt/tr_chapter-187/pg-7/ :D
Omg I just noticed red scratch mark on Tian's neck. Did he really got stabbed by that guy ;______;