你好，我是周兆坤，目前在 Yami（北美最大亚洲电商平台）担任 Growth Engineer。
我专注于电商增长全链路：营销自动化、流失预测模型、用户分层系统、转化漏斗优化。日常使用 SQL、Python 和数据仪表盘驱动决策。
这个网站是我的个人实验田——系统整理了 37 个电商增长指标，并用 100+ 个真实产品做了 SEO 落地页实验。所有内容开源，欢迎交流。
系统整理电商增长全链路 37 个核心指标：定义、公式、SQL、优化策略、企业案例。面向增长团队内训与自学。
A practical guide to buying Korean & Japanese sunscreens in the U.S. — retailer comparison, authenticity verification, and editor picks.
Where to buy ramen, snacks, condiments & Asian beverages online in the U.S. — category breakdown with 30+ product picks.
How to buy authentic K-beauty online: serums, creams, sunscreens, hair care & beauty devices — with counterfeit detection tips.
Best Japanese drugstore picks in the U.S.: acne treatment, hair masks, pore care & personal care — usage guides included.
Rice cookers (Zojirushi vs Tatung), soy milk makers & more — voltage guide and 15+ product recommendations.
涵盖获客、激活、转化、收入、留存、客户价值 6 大模块，配套闪卡、对比分析和互动测验。
Compare Yami, Amazon, YesStyle — delivery, authenticity, price ranges, and a practical buying checklist.
From Ichiran ramen to Samyang buldak — a category-by-category guide with 30+ product recommendations.
Sulwhasoo, SKIN1004, Beauty of Joseon — authentic K-beauty shopping guide with counterfeit detection tips.
Lion Pair acne care, Fino & Tsubaki hair masks — complete usage guides and comparison tables.
Zojirushi vs Tatung rice cookers, Joyoung soy milk makers — voltage compatibility guide included.
各种增长实验和 side project，跑通了就留下，跑不通就当学费。