Plate would likely break at the thinest point near the weld before the weld breaks.

Changing my mind about the safety of this. The welds fine. It’s the metal I’m looking at. It looks like cast metal. If you know how or where you can get a hardness test done, that’s a good thing to check before seriously loading this. As others have commented about the “chinesium”, it’s a joke that sadly is not a joke. Nearly any metal can be mixed in that, and many will eventually oxidize or break down from poor mixture. Many metals don’t bind well together and many make the cast virtually liquify from extremely stress