The creation of the Heroes and Dual Blades was disabled in China MapleStory several weeks ago and the update has now entered the testing phase. ChinaMS Tespia was opened on Friday, June 10. The exact date that Chaos will be patched into the live servers has not yet been announced but it can be assumed that this will take place on June 15 or June 22, a week or two before Chaos arrives in GlobalMS.
TaiwanMS and GlobalMS have both also began advertising their Chaos updates but no major teasers have begun, nor has public testing begun. It is likely that Global MapleStory will receive Chaos on June 29.