Following the success of the last conference held in Sydney, Australia in 2014, HKUST is pleased to invite you to attend the 7th International Conference on Unsaturated Soils (UNSAT2018) in August 2018. This conference will cover a broad range of themes and provide an excellent opportunity for worldwide academics, engineers, scientists, government officials and planners to present and exchange the latest developments in the research and application of unsaturated soil mechanics.