From my understanding they haven't been actively researching during that time.
It should also be noted that the team most likely did not intend to disclose any information already.
"Currently, two papers concerning LK-99 are available on the preprint service arXiv, which does not conduct peer review, and a related past study was published in the Journal of the Korean Crystal Growth and Crystal Technology in April 2023. Kim has only co-authored one of the arXiv papers, while the other is authored by his colleagues at QERC, some of whom also applied for a patent on LK-99 in August 2022. Both papers present similar measurements, however Kim says that the second paper contains “many defects” and was uploaded to arXiv without his permission. In that paper, the work is described as opening a “new era for humankind”." - From the New Scientist
The "second paper" referenced here is actually the first that was published, in which Young-Wan Kwon is the third author. If Hyun-Tak Kim states that this paper was not published with his permisison it seems like Young-Wan Kwon prematurely published it on arxiv to be the third author. The other paper was submitted by Hyun-Tak Kim just two hours later, listing himself as the third author.
Furthermore, Young-Wan Kwon isn't related to the Q-Centre anymore as he resigned from the function of CTO.
It should also be noted that the team most likely did not intend to disclose any information already.
"Currently, two papers concerning LK-99 are available on the preprint service arXiv, which does not conduct peer review, and a related past study was published in the Journal of the Korean Crystal Growth and Crystal Technology in April 2023. Kim has only co-authored one of the arXiv papers, while the other is authored by his colleagues at QERC, some of whom also applied for a patent on LK-99 in August 2022. Both papers present similar measurements, however Kim says that the second paper contains “many defects” and was uploaded to arXiv without his permission. In that paper, the work is described as opening a “new era for humankind”." - From the New Scientist
The "second paper" referenced here is actually the first that was published, in which Young-Wan Kwon is the third author. If Hyun-Tak Kim states that this paper was not published with his permisison it seems like Young-Wan Kwon prematurely published it on arxiv to be the third author. The other paper was submitted by Hyun-Tak Kim just two hours later, listing himself as the third author.
Furthermore, Young-Wan Kwon isn't related to the Q-Centre anymore as he resigned from the function of CTO.