执行shell脚本遇到错误syntax error: unexpected "then" (expecting "}")

root@ApFree:/usr/sbin# ./conntrack_num_graph.sh 
./conntrack_num_graph.sh: line 9: syntax error: unexpected "then" (expecting "}")
root@ApFree:/usr/sbin# 

#!/bin/sh
SITENAME="apfree"聽聽聽聽聽 # change for your site
mkdir -p /mnt/rrd 
#iptables -L traffic -vnxZ -t filter > /tmp/traffic.tmp
# $1 = ImageFile, $2 = Time in secs to go back, $3 = RRDfile, $4 = GraphText
CreateGraph ()
{
聽聽聽聽聽聽聽聽# only run, if no other rrdtool is running
聽聽聽聽聽聽聽聽if [ -n "$(ps | grep rrdtool | grep -v grep)" ];then
                        return
聽聽聽聽聽聽聽聽fi
聽
聽聽聽聽聽聽聽聽rrdtool graph "${1}" -a PNG -s -"${2}" -w 550 -h 240 -v "" \
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽‘DEF:count=‘${3}‘:conntrack_count:AVERAGE‘ \
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽‘AREA:count#32CD32:Conntrack number‘ \
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽‘HRULE:0#000000‘ -t "${4}"
}
聽
# build sum-graph
if [ ! -e /mnt/rrd/conntrack_num.rrd ] ; then
聽聽聽聽聽聽聽聽rrdtool create /mnt/rrd/conntrack_num.rrd -s 300 \
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽DS:conntrack_count:GAUGE:600:0:600000000 \
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽RRA:AVERAGE:0.5:1:600
fi
CONNTRACK_COUNT=`cat /proc/sys/net/netfilter/nf_conntrack_count`
rrdtool update /mnt/rrd/conntrack_num.rrd N:$CONNTRACK_COUNT
CreateGraph /mnt/rrd/conntrack_num.png 86400 /mnt/rrd/conntrack_num.rrd "conntrack from $SITENAME"