According to Yeosu City, Yeoni and Suni wore the facial mask installed at 8 points of auto drive way at Wolsan, Yeulchon-myeon, Myodo IC form, Marine Park, Yeosu EXPO Station, Dolsan Park, Sungsan Park, EXPO site and Yeosu City Hall gate. The lettering, 'Covid-19 Out, Mask is the vaccine' alarms the citizens and tourists to Yeosu City across the entry point and tourists' attractions and guides not to forget wearing the facial mask.

The city authority told, "a lot of tourists will visit in spite of mobility banning movement on Mid-Autumn Festival while Yeosu is renowned as clean area", and 'we expect for the citizens and tourists to help covid-19 prevention while they have the mindset of safety keeping while they see the World EXPO mascot, Yeoni and Suni with facial mask.