The release date of Dragon 4 has not been confirmed yet because Dragon 4 is in Jiangnan and Jiangnan is currently busy with other affairs, so the release date of Dragon 4 has not been confirmed yet. However, Gangnam usually releases the outline and some chapters of the novel within a few months after the completion of the writing, so we can expect Gangnam to release the official version of Dragon 4 at some time in the future.
There is no exact date for Dragon 3 to be published yet, but writing has already begun and it is expected to be published in the next few years. Gangnam had already made it clear that Dragon 3 would be published in 2023. However, the specific publication time still needed to be confirmed by Jiangnan and the publishing house.
The release date of Mute House 4 has not been officially confirmed yet because it is an unpublished novel, so the specific release date has not been confirmed yet. However, the author, Daoist Master Xuanmu, once revealed some information about "Mute House" 4 on his social media. He said that it was a novel that was very much worth looking forward to and hinted that it might be published in the next few years. However, these were only his personal comments. The specific publication time still needed to wait for the official announcement.