Complex sentence: Since 1975, Pakse has become an economic power and of regional importance within the region and the construction of a bridge over the Mekong (built with Japanese aid), allowing road traffic with Ubon Ratchathani in Thailand, has further integrated the city with neighbouring countries.
Split into simpler sentences: Since 1975, Pakse has become an economic power and of regional importance within the region. The construction of a bridge over the Mekong (built with Japanese aid), allowing road traffic with Ubon Ratchathani in Thailand, has further integrated the city with neighbouring countries.