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:

A historic day in #PhnomPenh！State Councilor and FM Wang Yi, together with Cambodian PM Hun Sen, just witnessed the official signing of a free trade agreement between #China and #Cambodia. 
🔗https://t.co/HbwV8x7Ai2 https://t.co/9ti35OtEbZ