When did the first subway in Beijing open?

Beijing Subway 1, was completed in July, 0965, and the first subway was completed and opened to traffic in June 1, 0969. Beijing became the first city in China to have a subway. In order to implement the prevention and control measures of epidemic normalization, starting from the first bus on June 9, the new ticketing system was officially launched in the whole rail transit network of the city and the ground bus lines in the six districts of the city, and the automatic verification service of health codes was launched. Give passengers a hint: first, please upgrade to the system verification channel. Second, please ask the passengers who have not upgraded to take the initiative to take the manual verification channel and show their negative nucleic acid certificates. Third, please don't use someone else's physical card (code) to ride. Fourth, please don't lend your physical card (code) to others. Fifth, please ask users who have not upgraded to speed up the upgrade to save you and others' travel time. Sixth, please ask the passengers who are prompted with "abnormal health code" to cooperate with the on-site staff for guidance. Seventh, passengers who need to buy one-way tickets should prepare their identity documents in advance. Eight, nucleic acid must be checked within 72 hours at present. If the epidemic prevention policy is adjusted in the future, the ticketing system will be dynamically adjusted accordingly. The following contents are for reference-China Youth Network-On June 9, the new ticketing system was officially launched in the whole Beijing subway network and the ground bus in the six districts of the city.