TECHNOLOGY FOCUS - ELECTRONICS - Preferred Component: The polymeric light-emitting element has an anode, a cathode and an organic layer provided between the anode and the cathode. The polymeric light-emitting element contains the composition.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Units: The repeating unit which has hole-injection property is a bivalent aromatic amine group of formula (2). The bivalent aromatic amine group (2) is represented with formulae ((2-1)-(2-3)). The repeating unit which has electron-injection property is a benzo fluorene diyl group which optionally has a bivalent hetrocyclic group of formula (3) or a substituent.Ar1- Ar4=arylene group which optionally has substituent or bivalent heterocyclic group;Ar5-A7=aryl group or monovalent heterocyclic group which optionally has substituent;x,y=0 or positive integer;R3=H, alkyl and alkoxy groups which optionally have substituent;X'=-O-, -S-, -S(=O)-, -S(=O)2-, Si(R5)2-Si(R5)2-, -Si(R5)2-, -B(R5)-, -P(R5)-, -P(=O)(R5)-, -O-C(R5)2- or -N=C(R5)-;andR5=H or substituent.Preferred Compound: The composition further contains a polymer which does not have repeating unit (1). Preferred Properties: The weight average molecular weight of polystyrene conversion of the polymer is 3x 103-1x 108. Preferred Composition: The composition contains the low molecular fluorescence material (0.01-49 wt.pts) with respect to the polymer (100 wt.pts). EXAMPLE - 9,9-dioctyl-2,7-dibromofluorene (in mg) (461), 2,7-dibromo-9,9-diiso pentyl fluorene (97), spin-dried 3,7-dibromo-2-heptyloxy-8-octyloxy-dibenzothiophene (126) dissolved in tetrahydrofuran (39 mL), N,N'-bis(4-bromo phenyl)-N,N'-bis(4-t-butyl-2,6-dimethylphenyl)-1,4-phenylenediamine (103), and 2,2'-bipyridyl (550) were mixed under nitrogen atmosphere. Then, bis(1,5-cycloocta diene)nickel (960) was added, heated at 60degrees C, reacted for 3 hours, and cooled to room temperature. The obtained solution was dripped into mixed solution containing 25 wt.% aqueous ammonia (20 ml)/methanol (240 ml)/ion-exchange water (100 ml), and stirred for 30 minutes. Then, the precipitate which was precipitated from the solution was filtered, and dried under reduced pressure for 2 hours. Then, dissolved in toluene (60 ml). 1N hydrochloric acid (60 ml) was added, stirred for 3 hours, water layer was removed, aqueous ammonia (60 ml) was added to organic layer, organic layer was dripped into methanol (300 ml), and stirred for 30 minutes. Then, the precipitate which was precipitated from the solution was filtered, and dried under reduced pressure for 2 hours. Then, dissolved in toluene (60 ml). Then, refined through alumina column, recovered toluene solution was dripped into methanol (400 ml), and stirred for 30 minutes, precipitate was filtered, and dried and reduced pressure for 2 hours to obtain polymer (410). The obtained polymer having photoluminescence light-emission peak of 465 nm and rubrene having photoluminescence light-emission peak of 560 nm were mixed in weight ratio of 95:5 to obtain composition. The obtained composition selectively acquired the light-emission originating in low molecular fluorescence material.