When searching, if the special beginning is followed by four digits, you can simply ignore the special beginning and the-sign. These four digits are the year, and the last six digits are needed. For example, if you search for this patent, you can directly fill in 2004230527 and fill in Type A..
If the special opening is followed by "Ping" or "Zhao"+one or two digits, it will take some effort. This Zhao Ping is the Japanese year number. If it is flat, this number needs to be added with 1988; if it is Zhao, it needs to be added with 1925.
For example, if the Japanese patent publication number is 9- 100463, you need to enter 1997 100463 when searching, and fill in a for the same type; If it is JP-A 55- 100463, you need to enter 1980 100463, and the type is also A.