Excuse me, can the sliding door of the wardrobe be changed into a horizontal door?

You can't. Because according to Article 5 of the Measures for the Administration of Residential Interior Decoration, the following acts are prohibited in residential interior decoration activities:

(a) without the consent of the original design unit or the design unit with corresponding qualification grade, changing the main body and load-bearing structure of the building without authorization;

(2) Changing rooms or balconies without waterproof requirements into bathrooms and kitchens;

(3) Expand the original size of doors and windows on the load-bearing wall, and dismantle the brick-concrete wall connecting the balcony.

Extended data:

According to the provisions of Article 6 of the Measures for the Administration of Residential Interior Decoration, the decorator shall not engage in the following acts without approval:

(1) Building buildings and structures;

(two) to change the facade of the house and open the doors and windows on the non-load-bearing external wall;

(3) Dismantling heating pipelines and facilities;

(four) the demolition of gas pipelines and facilities.