Welll if they are determinate then you won't want to prune them at all. If they are indeterminate then you aren't required to prune them either. It is strictly optional. So either way, no pruning is necessary.

That said, the variety called Chinese Purple is listed as an indeterminate beefsteak variety on the two sources I checked. So it will require caging or staking and any pruning yes or no is your choice.

As to removing blooms, that too is optional. The plant will either set fruit with them if it is mature enough or drop them if it isn't so it makes no difference and most just let the plant decide. Shame to miss out on that first fruit if it isn't necessary. So it is up to you.

Dave

The old dilemma: grow a just a few big slicers or lots of medium maters :-) I always go round and round myself. The best solution I've come up with is to plant a few of each and let some make as many tomatoes as possible and try to get a whopper off one of the plants by picking as many of the blooms as I can stand to do.

Regardless of what you do with the blooms n fruits, I'd support and prune the plants.