Park Bo Gum's Taiwanese fans were shocked when "Descendants of the Sun" actor Song Joong Ki joined their idol at his fan meeting on Monday.

According to Allkpop, Park Bo Gum was joined by 4,000 fans on his Asian fan meeting tour in Taiwan. The event was made even more memorable for these thousands of fans when Song Joong Ki came out and joined the "Moonlight Drawn By Clouds" actor on stage.

Park Bo Gum and Song Joong Ki showed their bromance at the fan meeting event, sharing how they cheer on each other in their respective projects. The latter described his co-actor as his advisor in acting, while the former revealed the reason behind his tears at the 2016 KBS Drama Awards.

"Not only was I happy that Bo Gum won but it reminded me of the times that Bo Gum expressed his concerns about acting, and I also won the same award 5 years ago so it made me think of that time too," Song Joong Ki said.

It can be remembered that Park Bo Gum earned the Best Excellence Award at the awarding event for his role in "Moonlight Drawn By Clouds." During his acceptance speech, Song Joong Ki was spotted emotional while listening to the co-actor.

The two were even branded as "Crybaby brothers" after the 2016 KBS Drama Awards as per Korea Herald. During the fan meeting event, Song Joong Ki willingly participated in games and Q&A session with Park Bo Gum.

On the other hand, Park Bo Gum is set to visit other Asian countries for his fan meeting tour. Previously, he visited Indonesia where he experienced their culture and tried the country's local delicacies.

The "Moonlight Drawn By Clouds" actor is expected to hold fan meeting events in Malaysia, Japan, Thailand and Singapore.