Moss commented that she had difficulty with this process. The directors had long been admirers of Hong Kong action cinema, so they decided to hire the Chinese martial arts choreographer and film director Yuen Woo-ping to work on fight scenes. To prepare for the wire fu, the actors had to train hard for several months. The Wachowskis first scheduled four months for training, beginning in October 1997. Yuen was optimistic but then began to worry when he realized how unfit the actors were. Yuen let their body style develop and then worked with each actor's strength. He built on Reeves's diligence, Fishburne's resilience, Weaving's precision, and Moss's feminine grace. Yuen designed Moss's moves to suit her deftness and lightness. Prior to the pre-production, Reeves underwent a two-level fusion of his cervical (neck) spine due to spinal cord compression from a herniated disc ("I was falling over in the shower in the morning"). He was still recovering by the time of pre-production, but he insisted on training, so Yuen let him practice punches and lighter moves. Reeves trained hard and even requested training on days off. However, the surgery still made him unable to kick for two out of four months of training. As a result, Reeves did not kick much in the film. Weaving had to undergo hip surgery after he sustained an injury during the training process. Filming All but a few scenes were filmed at Fox Studios in Sydney, as well as in the city itself, although recognizable landmarks were not included in order to maintain the impression of a generic American city. The filming helped establish New South Wales as a major film production center. Filming began in March 1998 and wrapped in August 1998; principal photography took 118 days. Due to Reeves's neck injury (see above), some of the action scenes had to be rescheduled to wait for his full recovery. As a result, the filming began with scenes that did not require much physical exertion, such as the scene in Thomas Anderson's office, the interrogation room, or the car ride in which Neo is taken to see the Oracle. Locations for these scenes included Martin Place's fountain in Sydney, half-way between it and the adjacent Colonial Building, and the Colonial Building itself. During the scene set on a government building rooftop, the team filmed extra footage of Neo dodging bullets in case the bullet time