[solved]About route again (strongswan)

Hello all
I am established up a vpn tunnel use two openwrt by strongswan
#ipsec status :
Security Associations (1 up, 0 connecting):
a[56]: ESTABLISHED 12 seconds ago, local_wan_IP[localIP]...remoteIP[remoteIP]
a{33}: INSTALLED, TUNNEL, reqid 22, ESP in UDP SPIs: c4d0570b_i c694128f_o
a{33}: 192.168.3.0/24 === 0.0.0.0/0

Created the rule and route by system:
#ip route show table 220
default via local_wan_IP_gateway dev eth1 proto static src 192.168.3.1
(All client can't access internet this time
Can't access openwrt_lan_ip:192.168.3.1 also).

I'm insert the route to table 220
#ip route add 192.168.3.0/24 dev br-lan src 192.168.3.1 table 220

(All client can access internet via traffic local isp now , this is what I expected)
(Client can't access openwrt_lan_ip:192.168.3.1 still)

Problem is:
When anyone client tracert any external_IP(Outside the local_wan_IP_gateway )after that all client is down until delete and reinsert the route manually or wait the CHILD_SA(c4d0570b_i c694128f_o) is changed .

And the traffic is send to remote_openwrt when execute tracert ip
(This is not what I expected and I don't know why.)
#traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 46 byte packets
1 * * *
2 local_wan_IP 3093.182 ms !H 3116.784 ms !H
(traceroute is end)

Please help me .thank you.