There are 4 'rods', assuming they are only 16mm, the nominal working load, in tension, is around 800 kg each, multiply by 4 = 3.2 tonnes safe working load, they ain't going to get broke by that 5 tonne Chinese jack, even allowing for uneven loading.
If there's a bigger jack involved only one will let go, after it's bounced off the ceiling there won't be too much drama! re drill for 20mm studding and try again.....
Cheers
Stef