The website Persian Journal reports:

Tehran and Beijing air liners to open direct flight links between the two metropolitan cities, after the two sides laid out plans to declare the two cities as sister.

Chinese companies plan a high-profile contribution to the major construction projects in Iran, it was said here after a meeting between Beijing ambassador to Iran and Tehran governor.

Liu Jin Tang, People's Republic of China's (PRC) envoy to Tehran in a meeting with Tehran governor Ali Akbar Rowhani called for immediate declaration of the two densely populated city's sisterhood without formalities.

LINK:
Persian Journal (Iran News): Tehran-Beijing mull direct flights