Simplify the following text for a Grade 12 native English-speaking person.
Original: Since reunification , the German government has spent vast amounts of money on reintegrating the two halves of the city and bringing services and infrastructure in the former East Berlin up to the standard established in West Berlin .
Simplified: Since reunification , the German government has spent lots of money on rejoining the two halves of the city and bringing services and buildings in the former East Berlin up to the standard in West Berlin .