Tehran Construction Industry Exhibition was held in 1400 as one of the most important specialized events in the field of construction and architecture in Iran. This exhibition was held in person and brought together a group of companies and specialists in this field. This exhibition provided a good opportunity to exchange knowledge, review trends and create business connections between construction industry activists. Also, it helped to improve quality and innovation in construction projects and improve productivity in this industry. The 1400 exhibition, especially in the situation after the spread of Corona, showed the determination and will of the activists of this industry for reconstruction and development.