1.第二季以后，周清包子铺都已经在网上卖包子了，所有经营资质都齐全了吗？需要有哪些证件？
没有，1.营业执照 2.卫生许可证 3.税务登记证。
2.阅读一篇以上ecommerce laws相关英文文章，按最新要求列出相关内容
What is E-Commerce Law?
Electronic commerce, commonly known as e-commerce or eCommerce, refers to the Internet based industry of buying and selling products or services via electronic means. E-Commerce uses a combination of Internet technology, mobile commerce, electronic funds transfers, escrowing services, electronic data interchange, supply chain management, inventory management systems, Internet marketing, data collection systems, and many other technologies and innovative business systems. Most, if not all, e-commerce transactions use the Internet for at least one point of the transaction.
refer to
当阅读到，提及，说起，
via prep.
经由(某地), 经过, 取道
transaction n.
交易; 业务
escrow
n.
暂由第三者保存的契据；有待完成条件的债券（或契约等其他文件）
v.
〈主美〉将…交由第三方保管以待条件实现
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