How many time is Niels Christian Kaldau one winning man's single and Pi Hongyan is winning woman's single the same year?
Year Mens singles Womens singles Mens doubles Womens doubles Mixed doubles
Bitburger Open
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1-12275654-1
Previous winners
Previous winners
1988 Kim Brodersen Katrin Schmidt Markus Keck Robert Neumann Katrin Schmidt Nicole Baldewein Markus Keck Katrin Schmidt
1989 Sörgard Katrin Schmidt Stefan Frey Robert Neumann Birgitta Lehnert Monica Halim Chen Jin Katrin Schmidt
1998 Yong Yudianto Karolina Ericsson Michael Keck Christian Mohr Erica van den Heuvel Judith Meulendijks Michael Keck Nicol Pitro
1999 Oliver Pongratz Zheng Yaqiong Quinten van Dalm Dennis Lens Britta Andersen Lene Mork Chris Bruil Erica van den Heuvel
2000 Xie Yangchun Xu Huaiwen Michael Søgaard Joachim Fischer Nielsen Claudia Vogelgsang Xu Huaiwen Michael Keck Erica van den Heuvel
2001 Niels Christian Kaldau Pi Hongyan Michael Søgaard Michael Lamp Neli Boteva Elena Nozdran Chris Bruil Lotte Bruil-Jonathans
2002 Chen Gang Pi Hongyan Simon Archer Flandy Limpele Mia Audina Lotte Bruil-Jonathans Nathan Robertson Gail Emms
2003 Dicky Palyama Xu Huaiwen Michał Łogosz Robert Mateusiak Nicole Grether Juliane Schenk Frederik Bergström Johanna Persson
2004 Niels Christian Kaldau Xu Huaiwen Simon Archer Anthony Clark Kamila Augustyn Nadieżda Kostiuczyk Rasmus Mangor Andersen Britta Andersen
2005 Kasper Ødum Xu Huaiwen Tony Gunawan Halim Haryanto Nicole Grether Juliane Schenk Vladislav Druzhchenko Johanna Persson
2006 Ronald Susilo Xu Huaiwen Michał Łogosz Robert Mateusiak Jiang Yanmei Li Yujia Robert Mateusiak Nadieżda Kostiuczyk
2007 Lu Yi Wang Yihan Mathias Boe Carsten Mogensen Yang Wei Zhang Jiewen Kristof Hopp Birgit Overzier
2008 Chetan Anand Maria Febe Kusumastuti Mathias Boe Carsten Mogensen Helle Nielsen Marie Roepke Diju Valiyaveetil Jwala Gutta
2009 Jan Ø. Jørgensen Juliane Schenk Rupesh Kumar Sanave Thomas Helle Nielsen Marie Roepke Mikkel Delbo Larsen Mie Schjoett-Kristensen
2010 Chen Long Liu Xin Mathias Boe Carsten Mogensen Pan Pan Tian Qing Zhang Nan Zhao Yunlei
2011 Hans-Kristian Vittinghus Li Xuerui Bodin Isara Maneepong Jongjit Mizuki Fujii Reika Kakiiwa Chan Peng Soon Goh Liu Ying
2012 Chou Tien-chen Juliane Schenk Ingo Kindervater Johannes Schoettler Wang Rong Zhang Zhibo Anders Kristiansen Julie Houmann
table_12275654_1
SELECT COUNT Year FROM table WHERE Mens singles = Niels Christian Kaldau AND Womens singles = Pi Hongyan
Niels Christian Kaldau Pi Hongyan