There is no place directly called "Jefferson Square" in Washington DC
You probably mean the square in front of the "Thomas Jefferson Memorial"?
--Exterior of the building
--Location of the Jefferson Memorial in Washington, D.C.
In 2005, China and the United States organized a "Peace and Security" event. In 2005, China and the United States organized an "Ode to Peace - International Youth Culture and Arts Festival", and some children danced in front of the Jefferson Memorial, which was translated as "Jefferson Square" by domestic newspapers:
Xinhua News Agency: On the 13th, a ceremony was held at Jefferson Square in Washington, DC. Chinese girls perform a red silk dance at the "Ode to Peace" International Youth Culture and Arts Festival in Jefferson Square, Washington. The "Ode to Peace" event takes peace as its theme and invites young people from all over the world to organize various kinds of creative works, exhibitions, sports events, forums and other activities. This year, the "Ode to Peace" U.S. Washington chapter activities by the U.S. government and the support of Washington, D.C., the local government to organize the activities of the day identified as Washington - China Penglai Ode to Peace Day.