since they were filming something last year, they attended a promotional event together
the MC at the event asked Lay to teach some Chinese words to Krytal
and Lay told Krystal to repeat after him and told her a sentence in Chinese
after that, Krystal asked him what was the meaning and he said that it meant "today I'm ugly"
but it was actually "today, I'm beautiful"
post response: +80
original post: here