China has reportedly supplied its HQ-9B air defense system to Iran, a move drawing scrutiny given the system’s subpar performance in Pakistan, notably during India’s “Operation Sindoor.” Know why this strategic transfer is raising concerns in the Middle East. China has reportedly supplied its HQ-9B air defense system to Iran, a move drawing scrutiny given the system’s subpar performance in Pakistan, notably during India’s “Operation Sindoor.” Know why this strategic transfer is raising concerns in the Middle East.