Lincoln High School students are well prepared to welcome President Xi Jinping when he visits the school in Tacoma, Washington, on Wednesday. [Photo by Deng Yu/China Daily]

Visit to Lincoln High School in Tacoma

The couple visited Lincoln High School in the port city of Tacoma, Washington State on Sept 23. They were welcomed by a special musical presentation in which dozens of students sang "What a Wonderful World" in English and the Chinese song "In the Field of Hopes," which is the signature song of Peng.

Except for formal talks between bilateral leaders, there are no hard and fast rules on occasions where first ladies can accompany the presidents.

Peng has attended many non-governmental events with Xi on previous foreign visits. She was seated in the audience when Xi spoke at a university during their visit to Russia in 2013. She also visited a farm with her husband in Argentina last year.