This emoji means to own or posses.
CJK Ideographs are characters used in Chinese, Japanese and Korean languages. Their writing systems all completely or partly use Chinese characters.
📅 Japanese “Not Free of Charge” Button was approved as part of Unicode 6.0 in 2010
under the name “Squared CJK Unified Ideograph-6709”
and added to Emoji 1.0 in 2015.