Senses
自立门户/ 自立門戶 to establish one's independence
To leave one's family and set up a separate household to live on one's own.
自立门户/ 自立門戶 to found a new school
To establish a new school of thought, style of art, or technical discipline
自立门户/ 自立門戶 to branch out
To break away from an organization or partnership to set up one's own business or independent operation