On July 21, 2022, the Guangdong Hong Kong Macao Greater Bay Area Entrepreneur Alliance and the Hong Kong Special Administrative Region Economic and Trade Office in Thailand jointly held a luncheon in Phnom Penh titled "Hong Kong Guangdong Hong Kong Macao Greater Bay Area and Cambodia Partnership Towards a New Level".

Dr. Tsai delivered a keynote speech on "The Latest Development of the Guangdong Hong Kong Macao Greater Bay Area". The Guangdong Hong Kong Macao Greater Bay Area Entrepreneur Alliance, the Cambodian Chinese Chamber of Commerce, the Cambodian Chinese Association of Hong Kong Macao Overseas Chinese Merchants, the Cambodian Hong Kong Chamber of Commerce, and the Cambodian Chinese Council are joint organizers of the event. More than 200 government, diplomatic, business, venture capital firms, and business associations representatives from Cambodia, mainland China, Hong Kong, and multiple countries and regions attended the event.

Li Xiangyuan, Director of the Economic and Trade Office of the Hong Kong Special Administrative Region in Thailand, made a special trip to Phnom Penh to attend the event. He stated that the total population of the Guangdong Hong Kong Macao Greater Bay Area exceeds 86 million, and the GDP in 2020 exceeded $160 billion, which is approximately equivalent to the sum of the economies of Thailand and Indonesia, making it one of the largest middle-class consumer markets in the world. Hong Kong is willing to work closely with its Cambodian partners to explore unprecedented opportunities in the Greater Bay Area.