Simplify the following text for a Grade 10 native English-speaking person.
Original: The current name `` Guang '' itself means `` expanse '' , and has been associated with the region since the creation of Guang Prefecture in 226 CE .
Simplified: The current name `` Guang '' itself means `` expanse '' , and has been associated with the region since the creation of Guang Prefecture in 226 AD .