Stuttgart, Baden-Württemberg, Germany
Mexico City, Distrito Federal, Mexico
yan'an, Shaanxi, China
Beijing, Beijing, China
Vila Nova de Gaia, Portugal
Sankt-Peterburg, Saint Petersburg, Russian Federation
Bucharest, Bucharest, Romania
London, England, United Kingdom of Great Britain and Northern Ireland
Paris, Ile-de-France, France
Munich, Bavaria, Germany
Thu duc, Ho chi Minh, Viet Nam
Pisa, Pisa, Italy
