·  10/2002: Cedar City, Utah, USA: collections of Cretaceous plants.

·  07/1999: Axel Heiberg Island, Nunavut, Canadian High Arctic: collections of vascular plant fossils and botanical field study of Arctic living plants.

·  06/1998: Northern France: botanical field study trip.

·  07~08/1997: Botanical field trip around Germany (Berlin-Rostock-Lübeck-Bremen-Köln-Bonn-Münich-Würzburg-Bayreuth-Leipzig-Berlin).

·  10~11/1996: Ping Chau Island, Hong Kong: botanical field study trip and collections of fossil angiospermous fruits and seeds.

·  06/1996: Sequoia (Redwood) Forest Park, California, U.S.A.: botanical field study trip.

·  07~08/1995: Nagoya and Osaka regions, Honshu, Japan: botanical field study trip and collections of fossil nuts.

·  10/1994: Limburg, the Netherlands: botanical field study trip.

·  08/1994: Bohemia, Czech Republic: botanical field study trip and paleobotanical trip in Bohemia Basin.

·  07/1994: Austrian Alps and Lower Austria: botanical field study trip.

·  02/1994: Bucharest, Romania: botanical field study trip.

·  07~08/1993: Botanical expedition around China with Austrian botanists/ paleobotanists.

·  09/1991: Dalian, Liaoning, N.E. China: field excursion to temperate vegetation.

·  08/1990: Zhangjiajian National Forest Park, Hunan, C. China: field excursion to subtropical vegetation.

·  03~05/1988: Baise Basin, Guangxi, S.W. China: plant taxonomy field study trip and collections of plant fossils.

·  10/1987: Nanjing, Jiangsu, E. China: field excursion to northern subtropical vegetation.

·  06~07/1987: Fujian, S.E. China: excursion to southern subtropical and tropical vegetations and collections of plant fossils.

·  01~05/1986: Mt. Emei, Sichuan, S.W. China: collections of Lindera (Lauraceae).

·  07~08/1985: Mt. Hengduan, Sichuan, S.W. China: plant systematics and ecology field study trip.

·  06~07/1983: Mt. Emei, Sichuan, S.W. China: plant systematics field study trip.