Mounting assembly and apparatus

A mounting assembly configured for attaching at least one apparatus to a wall, the mounting assembly comprising:

• at least one mounting bracket configured to be connected to the at least one apparatus;
• a guide bar coupled to the at least one mounting bracket, the guide bar extending in an extending direction;
• and
• at least one base coupled to the guide bar, each of the at least one base comprising:
• a main plate configured to be attached to the wall;
• a connecting portion mounted on the main plate and comprising an adjustable-size cavity configured for receiving the guide bar in a first direction perpendicular to the extending direction of the guide bar, a size of the adjustable-size cavity being adjustable,
• wherein the adjustable-size cavity is adjustable between a first dimension in the first direction and a second dimension in the first direction, the second dimension is smaller than the first dimension in the first direction, in a case that the size of the adjustable-size cavity is the first dimension, a portion of the guide bar is insertable into the adjustable-size cavity, and in case that the size of the adjustable-size cavity is the second dimension, the portion of the guide bar is limited in and clasped by the adjustable-size cavity.