After leaving Stronghold 73, Ren Xiaosu did not care about what would happen in the stronghold. While he was on his way to join back up with his maidservant, the Anjing House was still issuing missions to deal with the Pyro Company through their text messages. From that, it could be seen that the battle in Stronghold 73 did not end with the cave-in at East Lake.
However, two days later, the Anjing House finally stopped sending out any further texts with regards to Stronghold 73. Thus, Ren Xiaosu concluded the battle should have completely ended and that the Anjing House and the Pyro Company would be withdrawing from Stronghold 73.
As for whether there was truly any laboratory data at the site, Ren Xiaosu suddenly had a feeling there should be.
This was because he did not see any of the Riders since the chaotic battle broke out.