On March 12, EXO's Chen communicated with his fans through the bubble for INB100 app. After his usual greeting, he encouraged fans to wear clothing in yellow or white the following day. For those who did not have clothing in these colors, he suggested drawing yellow hearts instead. Chen chose these colors because they represent the dandelion flower, symbolizing a 'grateful heart.'

He also asked soondingies, his special name for EXOLs, to share photos on 'X' with a hashtag shortened to #soon. Fans enthusiastically followed the dress code and posted pictures in yellow or white attire along with supportive messages. Some of these photos can be seen below.

Fans admire Chen's warmth and friendliness on the bubble platform, where he interacts with them as if they were close friends. This has left soondingies wondering why Chen did not join the bubble platform sooner, during his time with SM Entertainment.