As part of their 25 year pact, China will be integrating Iran into its mass surveillance system. Millions of cameras will be installed in 28 cities starting with the 7 largest, which will be linked into China's state surveillance and monitoring systems. https://oilprice.com/Geopolitics/Middle-East/China-Looks-To-Build-Espionage-Hub-In-Iran-Under-25-Year-Deal.html

Iran will be placed behind the Great Firewall of China. Mandarin will begin to replace English as the main foreign language taught in school.

China has big plans for Iran's labor pool. Factories and businesses will be set up by China. China will electrify the Tehran-Mashad Railway. There are plans for a Tehran-Qom-Isfahan HSR with a future extension of the line to Tabriz.

With the end of the UN arms embargo on Iran, China will be fast tracking development of a military presence in Iran. Chabahar will be developed into an Electronic Warfare Center. Russia and China will ensure the security of their investments.

Air bases at Hamedan, Bandar Abbas, Chabahar, and Abadan will be expanded. The Chinese version of the Tu-22M3 will be deployed to Iran as well as Su-34s.

5000 security personnel will be attached to protect work forces on the ground. With up to 50k Russian and Chinese military and paramilitary personnel arriving in the next 14 months as part of a comprehensive training mission for Iran's military and to provide security.

Along with all that the Chinese will be setting up one of the largest listening posts in the world at Chabahar in November with a staff of 1k. This station will train Iranian intelligence and surveil the Gulf States, the US and NATO.

The electronic warfare center at Chabahar will be linked with Russian and Chinese EW systems.