CN stands for China, and the year of application stands for 2005. 8 is the patent application category number, and 8 represents the PCT invention patent application that China has entered the national stage. 00000 12 The application serial numbers in the patent application numbers of each natural year are rearranged, that is, starting from 1 every year, the application serial numbers in the newly issued patent application numbers do not continue the application serial numbers used in the previous year.
.3 is the parity bit.