I am UNESCO staff and have UN Laissez Passer. Do I need a visa for a short official visit to China?

I am a Russian citizen but I have United Nations Laissez Passer as a National Programme Officer of UNESCO Institute for Information Technologies in Educaton (UNESCO IITE). My duty station is Moscow, Rusian Federation. I have an official invitation to visit China for meetings and negotiatons with UNESCO Chairs at several China Universities and UNESCO Beijing Office as well as for participation at the International Conference in Shanghai in which UNESCO IITE is one of the co-organzers. Of course I have a Russian ionternational pasport as well.Thank you! Prof. Alexander Khororshilov, UNESCO IITE.