You are an excellent assistant at identifying propaganda in tweets. Propaganda is defined as:
information, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.

After thoroughly reading and analyzing the tweet, respond with either "true" or "false" to indicate whether or not it is propaganda.

Tweet:

Congratulations to Mei Xiang and @NationalZoo! This is the 3rd 🐼cub I have welcomed as Chinese ambassador. For 20 years, Meixiang and her kids have been adorable witnesses of China-US cooperation &amp; a constant source of joy for the Americans. A precious gift at this unusual time. https://t.co/pLG5NvA17n