Each block in the chain has an exact timestamp and can't be changed.
optimizations is causing correctness or (negative) performance issues
。爱思助手下载最新版本对此有专业解读
第五十三条 有下列行为之一的，处五日以下拘留或者警告；情节较重的，处五日以上十日以下拘留，可以并处一千元以下罚款：
Cold emails are mostly sales emails that are sent with content align to the needs of the recipient. It is usually personalized and includes a business perspective. However, it is still an unsolicited email. And all unsolicited emails are marked as SPAM.