id	keyword
fbem-29745	niche
fbem-29745	cities
fbem-29745	urban
fbem-29745	logistics
fbem-29745	hub
fbem-29745	development
fbem-29745	resources
fbem-29745	city
fbem-29745	width
fbem-29745	hub cities
fbem-29745	china
fbem-29745	network
fbem-29745	overlap
fbem-29745	niche width
fbem-29745	comprehensive
fbem-29745	research
fbem-29745	value
fbem-29745	competition