Can anyone share some good quality tools from Aliexpress for assembling Shimano hydraulic brakes ?
You need tools to cut the hose, push in the hose inserts, tighten the flare nut, and bleed the system.
Cutting the hose and pushing in the hose insert you can do with a tool like https://www.aliexpress.com/item/1005007010716039.html
Tightening the flare nut, I would recommend using one of these with a torque wrench (use it at 90 degrees on the wrench only, not straight out) https://www.aliexpress.com/item/1005008722563105.html
Bleeding the brakes, you can use something like https://www.aliexpress.com/item/1005010037319341.html
Would also recommend picking up some spare BH59 or BH90 hose inserts and olives just in case. Everything else is just basic hand tools (flat head screwdriver, hex wrench, needlenose plier)
If you are buying these brakes brand new from Ali, the hoses are pre-attached to the brakes and are pre-filled with mineral oil and then sealed at the factory, and the shift levers are pre-filled, olive is installed, and then capped off. When you assemble them, you just push the hose into the levers, tighten the flare nut, and squeeze the levers. Usually will not have to fill or bleed the system afterwards.