I just found I get it works now.
I omit the IPv6 part cause none of my clients request the useless IPv6, and I omit the eth1 part, and I only have 142.4.19x.xx/30 IP, and I use one of them in br0:0 for gateway, and I thought I can use only 1 IP of that 4, but actually, I can use the rest 3 of...