Catalytic transfer hydrogenation (CTH) is considered to be a promising technology for upgrading biomass into fuels and valuable chemicals in the presence of multiphase catalysts 1 . Lignin accounts for 10 -35 % by weight and up to 40 % of the energy in biomass feedstocks 2 ,As one of the lignocellulosic biomass fractions can be used directly in the production of alkanes . Vanillin is currently the most abundant aromatic molecule produced on an industrial scale from lignin, and is one of the few renewable resources that can be easily catalyzed to obtain alkanes . The hydrogenation of vanillin as a lignin model has been a hot topic of research in the catalysis community. Vanillin has the potential to be upgraded to value-added compounds by catalytic hydrogenation and its valuable hydrogenation products are typically vanillyl alcohol (VA) and 4-methyl guaiacol (MMP). During the subsequent processing of biooils, thermally unstable compounds such as aldehydes, acids and sugars tend to cause catalyst coking and need to be converted to stable compounds (e.g. alcohols and diols). .These alcohols are more conducive to the subsequent processing of bio-oils with increased hydrogen content .Vanillyl alcohol is also more costly and expensive to produce than vanillin and can be used directly as a flavouring .MMMP can be used as a fuel additive or food flavouring agent ,and is also widely used as an intermediate for flavours or drugs and fragrances .The difficulty in this reaction is the selectivity control of the hydrogenation products. The catalysts typically used for the reduction of vanillin are divided into two main categories, noble metals and transition metals. The usual noble metal catalysts(Au 12 , Ru 13 , Pd 14 )due to their excellent catalytic reduction ability, will strip off O in one step during the reaction to produce 4-methyl guaiacol (MMP). The noble metal catalyst Pd has excellent hydrodeoxygenation ability for vanillin, e.g. Pd@CN N 15 can produce more than 99% MMP under relatively mild conditions, and up to 97% MMP selectivity when Al2O3 is used as a carrier. A number of noble metals based on C materials (Pt,Pd,Au,Ru,Rh) were used to study the comparative hydrogenation activity towards vanillin. At 100 °C and 3 MPa, Pd/C showed the highest catalytic activity, reaching 95% MMP selectivity at complete conversion. A selective conversion of 93.6% MMP could also be achieved when Pd was catalyzed in concert with the transition metal Cu. However, it is difficult to stay at the step of converting the carbonyl group to the hydroxyl group, i.e. the selective conversion of vanillyl alcohol cannot be achieved. The very few studies with noble metal Ir have only been able to produce up to 54 mol% VA at 25 °C and up to 24 mol% MMP at 50 °C. In addition to the high cost of noble metals, researchers have been working to develop new catalysts such as transition metal catalysts with a higher probability of H2 adhesion and the ability of transition metals to activate hydrogen.The common transition metal catalysts face problems such as harsh reaction conditions, metal leaching and poor environmental tolerance of the carrier. Transition metals such as Ni 1 ,Cu ,Co are commonly used as catalytically active centres for HDO catalysts. Ni activity is low compared to noble metals and only 64.6% MMP selectivity can be achieved with NCB as a carrier and is accompanied by by-product formation .However, neither catalyst can achieve complete conversion of each of the two products in the same catalytic system. For the hydrogenation of vanillin, the usual catalysts can achieve complete conversion of one product or achieve partial conversion of both products with modulation .In our work, we have developed a novel bimetallic catalyst encapsulated in nitrogen-rich carbon to achieve, for the first time, the selective and regulated conversion of two products, 96.06% vanillyl alcohol and 99.99% MMP, in the same system. Carbonaceous materials are known to be stable under harsh hydrothermal conditions (350-550 °C) .In addition, the electrochemical properties of carbon materials can be tuned by doping with the heteroatom N 29 Thus, the use of nitrogen-doped carbon (NDC) as a carrier for Ni nanoparticles allows the transfer of charge from Ni to the carrier, i.e. NDC, resulting in a more positive oxidation potential for Ni. Plus Co is more conducive to deoxygenation activity ,Our catalysts are therefore inexpensive, simple to prepare, stable, easy to separate and highly active, and at the same time have the advantage of being tunable to the target product. Due to the synergistic effect of Ni and Co bimetals, the vanillin hydrogenation reaction can be almost completely stopped at the intermediate step (Fig. ) to produce VA, and the catalytic activity of the active centre can be regulated by controlling the temperature only to achieve a complete conversion of the other product MMP which has never been reported before.