Dear participants,

The health and safety of our conference attendees is always of primary importance, and especially so in this current environment. UP 2020 Committee, after assessing health and travel advisories related to COVID-19, have decided to present this year's conference during November 16-19, 2020, but in an all-virtual, web conference format.

Summary and Abstract Deadline: July 31, 2020.

Author Notifications: Week of September 21, 2020.

Postdeadline Submission Open: October 1, 2020.

Early bird registration Deadline: October 25, 2020.

Postdeadline Submission Close: October 30, 2020.

Contributed submissions are now encouraged. Authors wishing to submit are requested to proceed online here. 

More information about the conference can be found at www.up2020.cn. 

We look forward to receiving your contribution and welcoming you online for an exciting scientific event.

On behalf of the organisers:

Franz Kärtner, DESY-CFEL and University of Hamburg, Germany

Munira Khalil, University of Washington, Seattle, USA

Ruxin Li, Shanghai Institute of Optics and Fine Mechanics, China

General Chairs

François Légaré, INRS-EMT, Canada
Tahei Tahara, RIKEN, Japan

Program Chairs

Ruxin Li, Shanghai Institute of Optics and Fine Mechanics, China

Local Chair