I searched for the fourth film many times but it didn't reveal, so the main content is a mystery. The last page of the third part briefly introduces Messenger, the voice of life, but this is not the main content. The main content must be related to this.
I don't think it will come out in August, because there is no preview for children's articles in August, and we will know when children's articles come out in September.
It was June or May. I remember reading in children's music. My sister said that Luo 4 had been basically finished. However, the completed manuscript does not mean that it can be published immediately, because Pingjiu still needs to draw illustrations. Even if it is finished, it will take time for typesetting, printing, publishing and cover making. The children's book in August didn't say that Luo 4 was published, but there was a shock 2, so it was said that any book published by children would be written, and Luo 4 was the same.
I think the release of Luo 4 in September is coming soon.
Although I can't help you, I play hard! I don't expect to adopt it, I just hope LZ can understand it and help LZ!