echo "create china hash:net family inet hashsize 1024 maxelem 65536" > /tmp/china.ipset
awk '!/^$/&&!/^#/{printf("add china %s'" "'\n",$0)}' /etc/china_ssr.txt >> /tmp/china.ipset
ipset -! flush china
ipset -! restore < /tmp/china.ipset 2>/dev/null
rm -f /tmp/china.ipset