When Uber entered China in $2013,$ it was seen by the local ride sharing company, Didi, as a $\_\_\_\_\_.$

$[$ Choose $]$Political element of PESTEL analysis$$Substitute$$Socio$-$cultural element of PESTEL analysis$$Core Competency$$Threat $($from a new entrant$)$Resources$$Direct competitor$$Porter$\text{'}$s Five Force Analysis$$Economic element of PESTEL analysis$$Vision statement$$Industry attractiveness$$Capability$$Mission statement$$