Carrier

const VTPOST = "vtp";
const EMS = "ems";
const VNPOST = "vnp";
const GHTK = "ghtk";
const GHNV3 = "ghnv3";
const SPX = "shopee";
const BEST = "best";
const TIKINOW = "tikinow";
const JNT = "jnt";
const JNT2 = "jnt2";