FAQ for
Ying xiong (2002) More at IMDbPro »

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No. Ying xiong (English: Hero) is based on a screenplay by Chinese writers Feng Li, Bin Wang, and Zhang Yimou, who also directed the film. It is loosely based on the life of Jing Ke, attempted assassination of the Chinese emperor Qin Shi Huang, who reigned from 221 BC to 210 BC.

The "wu" in "wuxia" refers to "martial arts" or "combat". The "xia" refers to a person whose sense of righteousness is so profound that it empowers them to sacrifice themselves and even break the law to help people. The closest equivalents in English would be the hero, knight, warrior, or vigilante in superhero comics. See here for more information about wuxia and the xia.

That's an ancient Chinese instrument called the "guqin".

In terms of wuxia masterpieces, Xia nu [A Touch of Zen] (1969) is seen as the influential epic grandmaster of the genre. Wo hu cang long [Crouching Tiger, Hidden Dragon] (2000) is probably the most well-known around the world. Some other wuxia flicks of note are Shi mian mai fu [House of Flying Daggers] (2004) and Man cheng jin dai huang jin jia [Curse of the Golden Flower] (2006). If you like wuxia movies, try some of Akira Kurosawas jidaigeki cinema, like Ran (1985), Kagemusha (1990), Yojimbo (1961), and Shichinin no samurai [Seven Samurai] (1954). Another Jet Li movie of interest might be Huo Yuan Jia [Fearless] (2006). Other movies similar to Ying xiong [Hero] include Chi bi [Red Cliff] (2008), Musa (2001), and Ching Se [Green Snake] (1993).