TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The polar solvent includes hydroxyl compounds, component (A) which is converted into hydroxyl compounds under alkaline conditions, ion liquids and/or water. The hydroxyl compound includes alcohol solvents and phenol solvents. The component (A) includes ketones and aldehydes, preferably acetone, methyl ethyl ketone and benzaldehyde. The hydroxide of alkali metals includes lithium hydroxide, sodium hydroxide and/or potassium hydroxide. The hydroxide of alkaline-earth metal includes beryllium hydroxide, magnesium hydroxide, calcium hydroxide, strontium hydroxide and/or barium hydroxide. The oxide of alkali metal includes lithium oxide, sodium oxide and/or potassium oxide. The oxide of alkaline-earth metal includes beryllium oxide, magnesium oxide, calcium oxide, strontium oxide and/or barium oxide. The carbonate of alkali metal includes lithium carbonate, sodium carbonate and/or potassium carbonate. The carbonate of alkaline-earth metals includes beryllium carbonate, magnesium carbonate, calcium carbonate, strontium carbonate and/or barium carbonate. The oxide of transition metals includes ferric oxide, ruthenium oxide, osmium oxide, copper oxide, stannic oxide, nickel oxide, palladium oxide, platinum oxide, cobalt oxide, rhodium oxide, iridium oxide, chromium oxide, molybdenum oxide and/or tungsten oxide. The sulfide of transition metal includes ferric sulfide, ruthenium sulfide, osmium sulfide, copper sulfide, stannic sulfide, nickel sulfide, palladium sulfide, platinic sulfide, cobalt sulfide, rhodium sulfide, iridium sulfide, chromium sulfide, molybdenum sulfide and/or tungsten sulfide. The double metal salt of transition metal includes copper chromite and/or ferric chromite. Preferred Condition: The liquefying reaction is carried out in presence of oxygen gas, preferably, inert gases, carbon monoxide or hydrogen.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The cellulose biomass includes fresh cellulose biomass and/or dry cellulose biomass. Preferred Composition: The content of the primary catalyst is 0.1-100 weight% based on dry weight of cellulose biomass. The content of the secondary catalyst is 0.1-100 weight% based on dry weight of cellulose biomass.