graph G {
    compound="true"
    rankdir="TB"
    bgcolor="white"
    fontname="Tahoma"

    node [
        fixedsize="false"
        fontname="Tahoma"
        color="white"
        fillcolor="grey"
        fontcolor="black"
        shape="box"
        style="filled"
        penwidth="1.0"
    ]
    edge [
        fontname="Arial"
        color="#00688b"
        fontcolor="black"
        fontsize="12"
        arrowsize="0.5"
        penwidth="1.0"
    ]




    "yhen@all-my-life.cn" -- "daniel.hill@intel.com" [label=" 50 ", penwidth="10", color="#00688bFF"];
    "zwl.sjtu@gmail.com" -- "jiawulin@vip.qq.com" [label=" 42 ", penwidth="8", color="#00688bDB"];
    "zwl.sjtu@gmail.com" -- "yhen@all-my-life.cn" [label=" 30 ", penwidth="6", color="#00688bB7"];
    "jiawulin@vip.qq.com" -- "yhen@all-my-life.cn" [label=" 30 ", penwidth="6", color="#00688bB7"];
    "daniel.hill@intel.com" -- "zwl.sjtu@gmail.com" [label=" 10 ", penwidth="2", color="#00688b70"];
    "daniel.hill@intel.com" -- "jiawulin@vip.qq.com" [label=" 10 ", penwidth="2", color="#00688b70"];
    "yhen@all-my-life.cn" -- "fortune_coder@foxmail.com" [label=" 2 ", penwidth="1", color="#00688b4C"];
    "zwl.sjtu@gmail.com" -- "fortune_coder@foxmail.com" [label=" 2 ", penwidth="1", color="#00688b4C"];
    "jiawulin@vip.qq.com" -- "fortune_coder@foxmail.com" [label=" 2 ", penwidth="1", color="#00688b4C"];
    "daniel.hill@intel.com" -- "fortune_coder@foxmail.com" [label=" 1 ", penwidth="1", color="#00688b4C"];

}