Can load-bearing walls have openings? Is it illegal?

The load-bearing wall can open the door, but when the size exceeds 300*300mm, the load-bearing wall needs to be reinforced according to the national standard. Before construction, the owner needs to collect relevant information for the housing management bureau or property inquiries (usually to be reported A copy of the property is prepared), and the construction can be started only after formal design and construction procedures have been completed. What information needs to be collected by the owner of the opening of the load-bearing wall: 1. The reinforcement plan at the stage of designing the reinforcement plan needs to have a drawing and seal of an enterprise with a class-A design qualification, and the seal of a first-class registered structural engineer, and provide design qualifications and business licenses at the same time and copies of relevant personnel affixed with the official seal. 2. The stage of finding construction units To find construction units, you need to find regular enterprises, enterprises with special professional (structural reinforcement) qualifications promulgated by the state, and provide copies of business licenses and qualification certificates with official seals. The construction process of the opening reinforcement of the load-bearing wall: 1. Demolition: use static cutting equipment to avoid damage to the original structure 2. Base level leveling: the reinforcement area around the opening needs to be polished and cleaned 3. Paste steel plate, carbon fiber or clad steel, Construction in strict accordance with the technical requirements of various reinforcement schemes