On December 7, 2021, some colleagues who stayed in the Tanzanian plastic bottle project began to return home for the Chinese New Year. Since August 31, 2020, it has been nearly a year and a half. The installation and commissioning of Tanzania plastic bottle turnkey project is coming to an end, and all colleagues have returned home one after another. In the past year or so, Shanghai IVEN's engineers and all personnel of the project have become friends and comrades in arms, working together, discussing together and making common progress. In addition to leaving behind a plastic bottle project in Tanzania, it also left behind the sweat and friendship of two teams. Seeing colleagues reluctantly saying goodbye, and customers caring remarks, I am moved. Thanks to the engineers of Shanghai IVEN for nearly 500 days of hard work, thank the customers of Shanghai IVEN for their trust and support, welcome the engineers of Shanghai IVEN home, and welcome the customers to visit IVEN frequently.