How to install interior room door?

First of all, 1 door leaf, 1 set of case wicks, 1 set of jambs, 3 non-directional hinges, 1 lock, 3,5*16, 3,5*20 and 3,5*50 chipboard screws for door assembly, fast adhesive, plastic hammer, hammer, wedge, silicone, Polyurethane foam, drill and cutting tools are required. *Firstly, the top frame and side frames of the door frames you choose according to your wall thickness should be adhered with fast adhesive. Then they should be mounted to each other with the help of 3,5*50 chipboard screws. Then it should be placed in the wall cavity and checked to see if it is on the square. It should be squared with the help of wedges. *Then, non-directional hinges should be placed on the leaf. The middle hinge should be screwed 10 cm below the top, 20 cm above the bottom, and 50 cm below the upper hinge if it is in the middle. Then, the upper hinge size should be taken and another piece should be screwed 2mm lower on the case. Then, the other hinges of the wing should be screwed, squared again, and the frame should be fixed with polyurethane foam. After the foam dries, the door lock and counter should be put back in place, and the sills should be attached by means of silicone. 3.5*16 chipboard screws can be used for door handles and locks (3 pieces per side for door handles, 2 for each rosette, 5 for door lock and counter. 15 pieces in total) 3,5*20 chipboard screws can be used for door hinges. (A total of 18 are used, 6 on each hinge. 3,5*50 chipboard screws are used to join the door frames. (Two for a 10-inch box, and 3 for a larger one.)