Visa need or not need to attend a one-week-long forum in Kunming for a Myanmar citizen

I'm a Uni student from Myanmar. I'm invited to attend a one-week forum to be held in Kunming in the middle of this month.

When I surfed into your website for application requirements, I found that under Mutual visa exemption agreements, Myanmar citizens with diplomatic service or official passport are exempted from Visa for a stay of 30days.
But, I'm not quite clear with your wording "official passport".( In my opinion, any passport issued by concerning authority of a country is official and my passport is an official one.) So, I'm confused that I need entry permit to attend this forum or not.
I'm leaving China a couple of days after the forum. So, my duration of stay will not be more than 10days.