BEIJING, Oct. 11— The Chinese government made its most explicit
call yet for international support to fight Muslim separatists
in its far West, saying it had evidence of their ties with
terrorist groups abroad.  Bolstering its fight against a small
separatist movement in the western region of Xinjiang, which is
dominated by the Muslim Uighurs, has been an implicit goal of
the government since the Sept. 11 attacks in New York and
Washington. China quickly declared its support for a global
antiterrorist campaign and has not objected to a limited
American-led military campaign in Afghanistan, with which it
shares a short border.  The Uighurs speak a Turkic language and
have more cultural affinity with Central Asia than with the rest
of China. Internal and exiled groups have called for an
independent or autonomous state of ''East Turkistan,'' the name
taken by a self-declared republic that existed briefly in the
1940's. There have occasionally been shootings of Chinese
officials and bombings in the region, and th