Why China fled Doklam?

Was INS Aridhaman the reason why China fled Doklam? But it is yet to be Launched. Was there a Secret launch?

According to reports in Indian media circles, INS Aridhaman, Second Arihant-class nuclear-powered ballistic missile submarine might have a launch later this month. Following its launch, the new vessel will undergo sea trials and will be inducted into service no later than 2019.
But the sneak peek suggests missile submarine might have a soft launch or may already have been launched after it was confirmed that Bhabha Atomic Research Centre (BARC) has completed assembly of the Second nuclear reactor, which is likely to propel the second N-powered submarine. INS Arihant was quietly inducted in the Indian Navy in July 2016. It was the first nuclear attack submarine built by a country other than the five permanent members of the United Nations Security Council.
But even if we go by media reports the second indigenous Arihant-class SSBN, INS Aridhaman is completely outfitted, all within 7 years from the time when its keel was laid at the Vizag special projects facility. It took less time to produce than the Ohio-class SSBN rolling out of the General Dynamics Electric Boat facility at Quonset Point, Rhode Island, and Groton, MA, which has by now manufactured over a hundred SSBNs and SSNs for the US Navy.
ins aridhaman
 
INS Aridhaman will carry twice as many missiles as INS Arihant besides travelling faster under water. It is fitted with eight launch tubes unlike its elder sister Arihant, which has only four. Further, experts say the new sub will carry K-15 and (the newer) K-4 ballistic missiles as does INS Arihant. K-4 is an intermediate range ballistic missile that can hit targets as far as 3500 km. 
The boat will have a seven-blade propeller powered by a pressurised water reactor. She can achieve a maximum speed of 12–15 knots (22–28 km/h) on water surface and 24 knots (44 km/h) underwater.
The submarine has eight launch tubes in its hump. She can carry up to 24 K-15 Sagarika missiles (each with a range of 750 km or 470 mi), or 8 of the under-development K-4 missiles (with a range of 3,500 km or 2,200 mi). 
INS Aridhaman will be fitted with the sonar ISS (Integrated Sonar Suite), state-of-the-art sonar developed by NPOL DRDO. It is a unified submarine sonar and tactical control system, which includes all types of sonar (passive, surveillance, ranging, intercept, obstacle avoidance and active). It also features an underwater communications system. The hull features twin flank-array sonars and Rafael broadband expendable anti-torpedo countermeasure. 
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