TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: An averaged outer diameter of the fibrous VGGF is 50-200 nm, and an averaged aspect ratio of the fibrous VGGF is 10-5000. In the VGGF composition, the non-fibrous carbon is connected to, overlapped with or separated from the fibrous VGGF. The fibrous VGGF comprises an elongated hollow multi-layered structure formed by wrapping graphite having a carbon hexagonal net plane. The carbon ingredient has the graphitization degree of greater than or equal to 85%. EXAMPLE - A VGGF composition was prepared as follows. At first, after raw material gas was delivered from raw material/catalyst gas source to mixer and was uniformly mixed with portion of carrier gas, reaction gas composed of raw material gas and carrier gas was delivered to pre-heater for pre-heating to 300 degrees C. Then, reaction gas pre-heated was introduced into reaction tube via guide tube for reaction, and meanwhile, other portions of carrier gas were delivered respectively to area between inner tubes and outer tube; to thermal-conductive material between inner tube and outer tube, while heater was heating outer tube and thermal-conductive material. After being heated by thermal-conductive material, carrier gas was injected into inner tubes through holes to mix with raw material gas. The VGGF produced was collected by product-collecting system, and effluent gas was recycled by carrier-gas recycling system. The raw material gas supply has reaction material composition of 95 wt.% toluene, 2 wt.% ferrocene, 2 wt.% ethyl 3-oxobutanoate, 0.5 wt.% bis(dimethylthiocarbamyl)sulfide, and 0.5 wt.% triethylenediamine; reaction material flow rate was 50 ml/minute (liquid phase at 25 degrees C, 1 ATM; entering reaction system after vaporization); carrier gas was hydrogen at flow rates of 20 L/minute (via guide tube), 30 L/minute (via holes); and 100 L/minute (via holes 130b); reaction time was 1 hours and continued until supply of raw material gas was stopped, with few deposits attached to tube wall; and products included VGGF collected in product-collecting system after reaction. Then, high-temperature heat treatment was performed on VGGF under 3000 degrees C in argon (Ar) atmosphere, so as to obtain highly graphitized VGGF composition. The scanning electron microscopy (SEM) diagram of VGGF composition showed area ratio of non-fibrous carbon to fibrous VGGF was 1.2%, outer diameters of fibrous VGGF were 50 nm-200 nm, and had averaged outer diameter of 110 nm, and aspect ratio of 180. Besides shape of straight line, fibrous VGGF also included elongated VGGF in y shape or had 3-D linkage structure. By another SEMs VGGF showed 3-D linkage structure, and had content of graphite fibers having 3-D linkage structure in fibrous VGGF of 22 area%. The transmission electron microscope (TEM) diagram of VGGF composition showed that fibrous VGGF in VGGF composition had elongated hollow multi-layered structure. An X-ray diffraction (XRD) diagram of VGGF composition by using Bragg's law, showed that it had graphitization degree of 95.4% Further, from analysis of elements, it was shown that carbon content of VGGF composition was 99.99%. From ICP-AES (Inductively Coupled Plasma with Atomic Emission Spectrometry) analysis, it was shown that iron content of VGGF composition was 35.9 ppm, and contents of other metals were not detected. From water content analysis, it was shown that water content of VGGF composition was 0.05%. When thermogravimetric analyzer (TGA) was used for analysis under test conditions including temperature increasing rate of 10 degrees C/minute and air flow rate of 10-20 ml/min, thermal decomposition onset temperature of VGGF composition was 752 degrees C. The volume resistance of pasty material formed by uniformly mixing N-methyl-2-pyrrolidone (NMP) with 30 wt.% of VGGF composition was 15 Omega .cm.