What are the requirements for the Laos photo competition?

According to the query "people who love to ask knowledge", we know.

1. No theme, no black and white color, no camera and mobile phone, no theme, no paper submission, single photo and group photo are ok. The group photo is calculated as 1, and each group photo is no more than 6.

2. Entries are submitted by e-mail, the picture format is JPG, and the data file is not less than 3M.

3. Under the premise of not violating the laws of nature within a reasonable range, post-processing is allowed.