Group 1 - The core viewpoint of the news is that Sinopec Guangzhou Engineering Co., Ltd. and Sinopec Refining Engineering Group Co., Ltd. have applied for a patent for a "light hydrocarbon conversion product distillation system and method" [1][3] - The patent application was filed on April 2025, and the public announcement number is CN120365950A [1] - The distillation system includes components such as an absorption tower, oil-gas separation tank, desorption tower, stabilization tower, and a pentane removal tower, connected in a specific sequence [1] Group 2 - Sinopec Guangzhou Engineering Co., Ltd. was established in 1998, located in Guangzhou, with a registered capital of 300 million RMB [2] - The company has participated in 4,173 bidding projects and holds 858 patents [2] - Sinopec Refining Engineering Group Co., Ltd. was founded in 2007, located in Beijing, with a registered capital of approximately 4418.54 million RMB [2] - This company has invested in 12 enterprises and holds 5,000 patents [2]