What does semi-bedroom for tour group mean?

Semi-lying is a semi-recumbent sleeping position.

Semi-recumbent sleeping position: refers to supporting the head with the palms of the arms, with the lower body leaning against the bed, while the head and neck are lifted off the bed and supported by the arms. Some people will sleep on their sides with their legs raised and their heads supported by the palms of their arms. People who sleep in this semi-recumbent position will not fall into a deep sleep.