Xiao Ri is the foremost General in the armies of the Asia-Pacific Alliance. He is an experienced military leader who rose to prominence during the First GLA War, leading the occupation and pacification of a GLA-blighted Europe. In peacetime, Xiao became a key figure in the formation of the Asia-Pacific Alliance, suppressing dissent, driving rebels from APA lands and keeping peace at any cost. His actions allowed the initially fragile coalition to solidify into a global superpower it is today.
It maybe possible that Taskmaster was the player general of first Generals and Zero Hour Chinese campaigns.
The Chinese characters "亚太联盟少将" (meaning Asia-Pacific Alliance Major General) are visible on his suit. That means he is a 1-star Chinese General, because the general military ranks of former/current socialist countries is slightly different from the Western ones, for example:
In Socialist countries:
1-star: Major General (少将, Thiếu tướng, literally means "Junior General")
2-star: Lieutenant General (中将, Trung tướng, literally means "Medium General")
3-star: Colonel General (上将, Thượng tướng, literally means "High General". This is the higest rank in the current China PR)
4-star: Army General (大将, Đại tướng, literally means "Great General". Not available in current China PR)
5-star: Marshal (元帅, Nguyên soái, not available in current China PR and Vietnam. It existed in China PR from 1955 to 1965.)
In Western countries:
1-star: Brigandier General (准将, Chuẩn tướng, literally means "Standard General")
2-star: Major General (少将, Thiếu tướng)
3-star: Lieutenant General (中将, Trung tướng)
4-star: Army General (大将, Đại tướng)
5-star: Marshal (元帅, yuán shuài) or (統制, Thống chế) in Europe, or General of the Army (元帅, yuán shuài) or (統将, Thống tướng) in the US and former South Vietnam.