It seems the MC version of this server is 1.12.2 (I thought that was 1.7.10) , However, I can’t connect to it still. By the way, I didn’t induce a mod pack to my system, I installed MC1.7.10 via HMCL, a Minecraft launcher, then I installed forge, and then manually put mods into .Minecraft/mods/1.7.10
Could you please tell me whether I installed forge in a right way?

