According to Articles 19 and 20 of the Administrative Measures for Information Disclosure of Listed Companies of China Securities Regulatory Commission, the disclosure time of the annual report of listed companies is within 4 months after the end of each fiscal year; The disclosure time of quarterly report shall be completed within 1 month after the end of the third month and the ninth month of each fiscal year, that is, the disclosure of the first quarterly report shall be completed before April 30th.
The announcement time of each company is different, but according to the regulations of China Securities Regulatory Commission, all listed companies need to make full disclosure within a certain period of time. Considering that there are many listed companies now, if the announcement will be too crowded at the same time, each listed company will agree on the announcement time in advance.