TECHNOLOGY FOCUS - POLYMERS - Preparation (disclosed): The high-molecular compound is obtained by condensation-polymerizing a monomer of formula: Y'1-A-Y'2 using a nickel or palladium catalyst.Y'1,Y'2=substituent which can carry out condensation polymerization;andA=arylene-containing repeating unit or phenoxazine repeating unit.Preferred Units: The arylene-containing repeating unit is of formula (3), and the phenoxazine repeating unit is of formula (5).Ar3,Ar4=Ar1, preferably group of formula (4);R6-R10=R1;e,f,h,i=a, preferably 0 ;g=0-5;andR11=R5.Preferred Property: The high-molecular compound has a number average molecular weight of 103-108 by polystyrene conversion. Preferred Compositions: A composition is obtained using a hole-transport material, an electron-transport material, and/or a luminescent material, and the high-molecular compound, and a composition is obtained using the high-molecular compound and a solvent. EXAMPLE - 2,7-Bis-(4,4,5,5-tetramethyl-1,3,2-dioxa-borolan-2-yl)-9,9-bis(4-hexyloxyphenyl)fluorene (in g) (1.54), 2,7-dibromo-9,9-bis-(4-hexyloxyphenyl)fluorene (1.15), 3,7-dibromo-N-octylphenoxazine (0.14), palladium acetate (0.7 mg), tri(2-methylphenyl)phosphine (8.7 mg), and toluene (23 ml) were mixed and heated in an inert atmosphere at 105degrees C. Sodium-carbonate aqueous solution (3.9 ml) was dripped in the reaction solution and refluxed for 4 hours. Phenyl boric acid (34.3 mg) was added after reaction completion and refluxed for 1.5 hours. Diethyldithia sodium carbamate aqueous solution was added and stirred at 80degrees C for 2.5 hours. The reaction mixture was cooled and washed thrice with water (30 ml), 3% acetic acid aqueous solution (30 ml), and water (30 ml). The obtained toluene solution was dripped in methanol (800 ml), and the obtained solid was filtered and dried after stirring for 3 hours to obtain a high-molecular compound (1.83). The compound had a number average molecular weight of 7.8x 104 by polystyrene conversion, a weight average molecular weight of 2x 105 by polystyrene conversion, and a glass transition temperature of 191degrees C, and excellent heat resistance.