Although the time of the summit was short, the content of the visit was very substantial, and the scene was packed. After a brief speech by Mr. Patrick, CEO of SIGA Group, Mr. PENG Xuanying, Technical Director of China, gave a detailed introduction to building airtightness and related regulations. In the following practice, we have studied the air tightness solution and application of wood structure building in detail and have personally participated in the bonding of air tightness tape on the building parts, such as the specific operation of air tightness treatment of doors and windows and wall-penetrating pipes. The summit invited Professor Feist, the father of Passive House, to give a keynote speech on 'Reliable Airtightness - Prerequisites for Any Energy-Efficient Building' for the participants, setting out the importance of and decisiveness of airtightness for energy-efficient buildings, as well as the airtightness requirements of passive buildings, the handling of airtightness measures in different parts, and the introduction of airtightness safety monitoring, etc.In SIGA's R&D department, laboratory and production workshop, Mr. Zhang Peng, the chief representative of SIGA China, 

took everyone to experience more practical interactions, such as the test for adhesive (bonding) performance of airtight tape under different humidity, temperature and aging conditions; the analysis of the test results have contributed in deepening the understanding of airtightness in practical project application, as well as the details of the professional airtightness tape in construction practice. 

After the compact meeting and training content, SIGA invited the Frey Group and the construction firms from Spain and North America to do special presentations. Ms. Duan Zhilan, Project, Program Director of Frey Group, briefed the representatives about the passive house project of the Group in China as well as the Group’s passive house demonstration residential project as the first German-developed project in China of its kind. The report received a high level of attention, with many participants speaking highly of the group's projects and expressing their willingness to further cooperation.