Its insurance arm is also a huge holder of Japanese government bonds, indirectly helping to keep interest rates low on Japan's mountain of sovereign debt, while its postal service is a political asset that employs more than 200,000 people.
More:Japan govt aims to list Japan Post in three years | Reuters
Can I replace the bold phrase by the following?
"indirectly help to keep interest rates low on Japan's mountain of sovereign debt"
Is there any grammar rule related to it?
Well, thank you!
I have searched the phrase "participial phrase" and found a great site discussing about this. It is here:The Participle Phrase