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:

Hoy, 23 aniversario del retorno de HK a la soberanía china. HK nunca ha dejado de formar parte del territorio chino. El concepto de un país dos sistemas se inscribe en la soberanía china sobre HK y en la Constitución china y la Ley Básica de la #RAEHK. https://t.co/OwrJA0oCTu