Abstract: The present invention discloses a polycarbonate composition, which includes the following components in parts by weight: a. 30-80 parts of a polycarbonate; b. 8-50 parts of a graft copolymer; c. 5-25 parts of a fire retardant; and d. 0-10 parts of other aids; wherein a sum of parts by weight of the four components a, b, c, and d is 100. A long-term thermal-oxidative aging property and a weathering property of the polycarbonate composition can be significantly improved when a total compounding amount of a transition element and an alkaline earth metal, which are added in a polycarbonate composition formula, based on a total weight of the polycarbonate composition is greater than or equal to 10 ppm and less than or equal to 600 ppm and a compounding molar ratio of the transition element to the alkaline earth metal is adjusted to 0.1-1; and the polycarbonate composition is particularly suitable for occasions with relatively high requirements for an operating environment.

Abstract: The present invention discloses a polyamide composition, which comprises the following components: a. 30 wt %-99 wt % of a polyamide resin; b. 0.001 wt %-3 wt % of a metal element; and c. 0 wt %-69.5 wt % of an additive; a content of the metal element is preferably 0.005 wt %-1 wt %, more preferably 0.007 wt %-0.2 wt %; and the percentages by weight are all relative to a total weight of a, b, and c. The polyamide composition prepared by adopting the polyamide resin having a specific pH value and a specific relative viscosity and adding the metal element of a specific content, of the present invention can be applied to a molding decorative lamp, and compared with a flame-retardant polypropylene material of an existing molding decorative lamp, can significantly improve a coloring property, a color stability and a heat retention stability of the material, and is bright in colors and high in production yield.