Novel benzoxazine oxazolidinone compounds, preparation methods and uses thereof are disclosed, which belong to the field of pharmacy. Synthetic insights of members of an expected audience at the proposed meeting are generated. The reflective surface of the reflective electrode is provided with an alignment film for twisting liquid crystal molecules contained in the liquid crystal layer. When a new radio bearer is established, the mobile station selects the highest HFN used during the session for the core network in question, increments it and uses it for initializing the count parameter for the new radio bearer. Such an independently arrived at threshold may be more suitable for the different task of differentiating between document background and document content.