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In page People's Liberation Army at the 1989 Tiananmen Square protests and massacre:

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The 15th Airborne Corps landed at the Nanyuan Airport south of the city to reinforce the 54th Army.[7] Airlifts continued into Nanyuan continued for the next three days. Five helicopters of the 38th Army appeared over Tiananmen Square and dropped leaflets calling on protesters to vacate the square.[1][8] The 65th Army made several efforts to advance on Tiananmen Square from the west but were forced to pull back into the Shijingshan and Haidian Districts.[citation needed] The only unit that advanced into the city was the 14th Artillery Division which traveled by train from Shahe but this unit was surrounded by civilians once it reached the Beijing railway station.[citation needed]