Complex sentence: Vietnam's central government signed an agreement in October 2010 to supply Japan with rare earth elements in Lai Châu Province as part of its efforts to diversify its supply of rare earth and decrease its dependence on imports from China.
Split into simpler sentences: Vietnam's central government signed an agreement in October 2010 to supply Japan with rare earth elements in Lai Châu Province. This is part of Japan's efforts to diversify its supply of rare earth and decrease its dependence on imports from China.