Parallel connection between distinct DC Bench Power Supplies
It is very likely that there will be no problem connecting them in parallel, as long as you can get the Voltages close to equal. A few mV will probably not matter. It is unlikely that current will flow into the output of the lower voltage supply unless it is the type of supply specifically designed to operate in this fashion (e.g, Hameg).

You could try asking the manufacturer about your question, although if it is "fake" then that might not matter. Also, you could consider renting a beefy supply just for this project.

Not all supplies can be put in series. It depends on whether they are isolated from Earth ground. Yours probably can be put in series, because it has green jacks (for "Earth" ground.)

Good luck to you.