Dear netizens

Sina constellation measurement platform has been receiving various feedback from users recently. Since it has not been upgraded since it was launched in 2015, we decided to go offline on February 28 for comprehensive upgrading and transformation of all products. The specific time of going online again will be notified. You can still log in to the product web page for the calculation items you have purchased over the years（ http://product.astro.sina.com.cn/ ）, get the result in [query consumption record].

Thank you for your support for constellation measurement products over the years. Please understand the inconvenience caused to you.

Sina constellation channel

February 25, 2022