Ad_lookalike References: https://github.com/YouChouNoBB/2018-tencent-ad-competition-baseline https://zhuanlan.zhihu.com/p/36302396 https://tech.meituan.com/deep-understanding-of-ffm-principles-and-practices.html https://blog.csdn.net/lujiandong1/article/details/52412123 https://blog.csdn.net/mytestmy/article/details/19088519