Following the CSCST-25 Special Issue [1] we continued this issue based on the 26th CSCST-SCI annual conference (CSCST-SCI 26), which was held at the Society of Chemical Industry (SCI) headquarter, 14/15 Belgrave Square, London SW1X 8PS on the 4th and 5th September 2019.The annual conference had 4 sessions with 20 oral and 14 poster presentations, which featured several plenary and keynote lectures by national and international eminent speakers.International researchers and delegates from China and Australia, and members of other SCI groups (SCI Energy Group and SCI London Regional Group) also joined the two-day event.Dr.Weiping Wu, Chairman of SCI Chinese UK Group introduced the history, membership, activities of SCI and SCI Chinese UK Group [2].Mr.Sunan Jiang, Minister Counsellor for Science and Technology Affairs, Embassy of the People's Republic of China in the United Kingdom gave a talk on the China-UK collaborations in science and innovations.Sharron Todd, Chief Executive Officer of SCI warmly welcomed everyone to the SCI headquarter and the conference, she awarded prizes to the oral presentation winners of CSCST-SCI 26.