Group 1 - The real estate sector experienced a significant rally on January 20, with stocks such as Dayuecheng and Wo Ai Wo Jia hitting the daily limit, following a surge in Chengtou Holdings and other companies like China Merchants Shekou and Poly Developments [1][2] - Chengtou Holdings, a comprehensive listed company controlled by Shanghai Urban Investment Group, has transformed from a government financing platform to a city comprehensive service provider, focusing on real estate development, operation, and financial investment [2][4] - The company has a diversified product system covering residential and commercial properties, and has participated in major urban development projects, contributing to the construction of affordable housing and rental residences in Shanghai [4] Group 2 - The recent rally in the real estate sector was driven by the Ministry of Finance and other departments extending the personal income tax preferential policy for residents' housing purchases until the end of 2027 [2] - The stock market saw a decline in major indices, with the Shenzhen Component Index dropping over 1% and the ChiNext Index falling more than 2%, despite the real estate sector's performance [2] - Chengtou Holdings has invested in the construction of 6.7 million square meters of affordable housing and 800,000 square meters of rental housing, benefiting approximately 200,000 citizens [4]