(1989)International Symposium on Agglomeration (Beijing)International Symposium on River Sedimentation International Symposium on Agglomeration International Symposium on Air Pollution (9th:1985)International Symposium on Neurosecretion 1st International symposium on ramie prifession International Symposium on Neurosecretion International Symposium on Synergetics International Symposium on River Sedimentation International Symposium on Actinide.