Chat is responsible for the construction and daily operations of Biotheus' new manufacturing facility in Nantong. Chat is an international expert in the design and construction of pharmaceutical manufacturing facilities with more than 30 years’ experience in the field. In China alone, he oversaw the construction of 3 biologics production plants in line with international GMP standards. Chat has previously served as the Vice President of Engineering at CStone Pharmaceuticals, responsible for the design and construction of 73,000 sq.m. facility, including manufacturing and R&D centers that comply with international GMP standards. He also served as the Head of Engineering at Pfizer and completed Pfizer's Hangzhou production facility, Vice President Engineering at Innovent Biologics, responsible for the construction of Innovent Biologics' Suzhou plant, Head of Engineering and Operations at Gilead in the US, and served as Head of a GMP project of Roche, responsible for construction and modification of clean rooms and office buildings in Puerto Rico, France, Mexico and South Korea.