TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Bifunctional Chimera: Endo5A and Gluc1C are linked by a glycine-serine linker (G4S) having SEQ ID No. 2 or 3. The number of linker varies from 0 to 3. The bifunctional chimera is selected from EG1 or Endo5A-Gluc1C having SEQ ID No. 5, where Endo5A is at N terminus and Gluc1C is at C-terminus; EG2 or Gluc1C-Endo5A having SEQ ID No. 6, where Gluc1C is at N terminus and Endo5A is at C terminus; EG3 or Endo5A-(G4S)2-Gluc1C having SEQ ID No. 7, where Endo5A is at N-terminus and Gluc1C is at C terminus and number of linker molecules is 2; EG4 or Gluc1C-(G4S)2-Endo5A having SEQ ID No. 8, where Gluc1C is at N terminus and Endo5A is at C terminus and number of linker molecules is 2; EG4 or Endo5A-(G4S)3-Gluc1C having SEQ ID No. 9, where Endo5A is at N terminus and Gluc1C is at C terminus and number of linker molecules is 3; EG6 or Gluc1C-(G4S)3-Endo5A having SEQ ID No. 10, where Gluc1C is at N terminus and Endo5A is at C terminus and number of linker molecules is 3. The Endo5A and Gluc1C are obtained from Paenibacillus MTCC 5639. Preparation (claimed): Preparing bifunctional chimera above comprises (a) constructing primers having SEQ ID Nos. 11-22; (b) designing and constructing chimera; (c) amplifying the chimera using PCR using the primers; (d) digesting with restriction enzymes; (e) cloning the digested chimera at corresponding restriction sites of vector; (f) transforming the vector and expressing recombinant proteins; and (g) purifying the recombinant proteins or bifunctional chimera. EG1 is constructed by amplifying Endo5A and Gluc1C using primer sets Endo-BamH1-EG1-F/Endo-Sacl-EG3-R and Gluco-Sacl-EG1-F/Gluc1C-SalI-R, respectively; EG2 is constructed by amplifying Gluc1C and Endo5A using primer sets Gluco1C-BamHI-F/Gluco-SacI-EG2-R and Endo-SacI-EG2-F/Endo-SalI-EG2-R, respectively; EG3 is constructed by amplifying Endo5A and Gluc1C using primer sets Endo-BamHI-EG1-F/Endo-SacI-EG3-R and Gluco-SacI-EG1-F/Gluc1C-SalI-R, respectively; EG4 is constructed by amplifying Gluc1C and Endo5A using primer sets Gluco1C-BamHI-F/Gluco-SacI-EG4-R and Endo-SacI-EG2-F/Endo-SalI-EG2-R,respectively; EG5 is constructed by amplifying Endo5A and Gluc1C using primer sets Endo-BamHI-EG1-F/Endo-SacI-EG5-R and Gluco-SacI-EG1-F/Gluc1C-SalI-R, respectively; and EG6 is constructed by amplifying Gluc1C and Endo5A using primer sets Gluco1C-BamHI-F/Gluco-SacI-EG4-R and Endo-SacI-EG2-F/Endo-SalI-EG2-R, respectively. The vector is a plasmid vector selected from pQE30 to obtain recombinant plasmids pQE-EG1 to pQE-EG6. The chimera is expressed in Escherichia coli with a 6-histidine tag at the N212 terminus and is purified through metal affinity chromatography. Preferred Method: In the method of hydrolyzing cellulosic biomass, the cellulosic biomass used for hydrolysis is prepared by alkaline fractionation process where the rice straw reacted with 10% (w/v) aqueous sodium hydroxide (NaOH) at 130 degrees C for 20 minutes; and the recovered residue is repeatedly washed with water the to remove the residual alkali; and further neutralized to pH 7.0 for the hydrolysis. EXAMPLE - No suitable example given.