Abstract: The present invention relates to a light-emitting device, a vehicle lamp and a vehicle, wherein a light-emitting device is used for a vehicle, the vehicle having a vehicle coordinate system that comprises three coordinate axes (X, Y, Z), the light-emitting device having a housing, a light-emitting assembly accommodated in the housing and a lens arranged in front of the light-emitting assembly, the lens having a light-transmitting zone assigned to the light-emitting assembly, wherein the light-transmitting zone is formed by a first strip unit and a second strip unit that extend obliquely with respect to the corresponding coordinate axis (Z) of the vehicle coordinate system, the first strip unit and the second strip unit intersecting each other, the intersection part being a convex or concave pillow-shaped unit.

Abstract: A method for preparing amantadine includes chlorinating adamantane with chlorine gas in a solvent in the presence of a Lewis acid catalyst to obtain a reaction liquid, and then removing the solvent and residues containing the catalyst in the reaction liquid, to obtain a chlorinated product. The chlorinated product is mixed with urea to a mixture, and the mixture is subjected to an amination reaction, to obtain amantadine. The results of examples show that the purity of the prepared amantadine could reach 99.5% or more.

Abstract: A method for preparing amantadine includes chlorinating adamantane with chlorine gas in a solvent in the presence of a Lewis acid catalyst to obtain a reaction liquid, and then removing the solvent and residues containing the catalyst in the reaction liquid, to obtain a chlorinated product. The chlorinated product is mixed with urea to a mixture, and the mixture is subjected to an amination reaction, to obtain amantadine. The results of examples show that the purity of the prepared amantadine could reach 99.5% or more.