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DingTalk is an enterprise instant messaging application software launched by China Alibaba Group, which provides multiple languages and supports multiple operating systems. Developed by Alibaba Group, 20 15 was officially launched.

The platform is provided free of charge to all enterprises in China for business communication and work collaboration, and helps enterprises in China to improve their communication and collaboration efficiency through systematic solutions.

A letter of criticism (also known as a letter of understanding) is a letter written by an individual or leader who has made a mistake to the parties or organizations to reflect on himself, review his mistakes and ensure that he will not make mistakes again. Self-criticism is a kind of daily practical writing, and its writing belongs to the category of applied writing research.

Self-criticism Self-criticism refers to self-criticism in written form when there are problems or mistakes in study or work, so as to avoid the recurrence of such incidents in the future. It generally includes wrong problems, causes, corrective measures or future plans. It is also a review of the mistakes you have made.