What's this?

@michael:
2005太平洋郵展在豐原市
was great!!!!!
非常謝謝

ooops.
Here is the pic.

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Is this circle　extent?

黑熊打了幾萬元.還沒遇到藍邊.應該問問印刷廠商?!到目前市面尚未見到黑熊試色票.印刷錯票..誰手上有?POST幾張瞧瞧見!!!!

Hi Karim,
How are You. Thanks very much for your cover.

P.S.: Is the chinese word wrote by yr Puzzle Queen !?

@cihaiyi : 不是
@ CHAN315: could you translate this, please?

I have asked some collectors: the freak seems to be caused by a particle (maybe dust?) on the cylinder not removed by the wipe blade. During rotation the particle moved slightly causing a slightly oblique blue line.
Since this is not an error it is quite unlikely to find this variety on the same paper roll again.

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因為顏色看起來很均勻，而且邊緣很平整，看起來不像是異物滾動沾墨造成的！

如果可以排除後天加工的可能性，khfr郵友不妨用放大鏡仔細看看那條藍帶子上是否有印刷網點，若有，那就表示郵資票印刷過程中，印刷工一個無意的舉動，造成後來郵資票迷意外的收穫；若沒有，可以再進一步研究。