QR code sender	Encrypted information coding	Identification code for suppliers $S^{i}$ , identification code for workers $W^{i}$ , identification code for procedures $P^{i}$ , consumer code $C^{i}$ , identification code for the purchased parts $L^{i}$ , identification code for the improved parts $I^{i}$ , identification code for new pars $A^{i}$ , box code $B^{i}$ , batch code $G^{i}$
QR code sender	Disclosed information coding	Identification code for vehicles $V^{i}$ , identification code for 4S stores $4 S^{i}$ , identification code for manufacturing enterprises $E^{i}$