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"It takes time (to improve ranking) and we are facing some legacy issues," the Chief Minister said.
She said there was a "perception problem" during the 34-year rule by the Left Front in the state but it has changed now.
Describing the state as the future destination for investments, Banerjee urged industry captains and investors from Asia, Europe, and the US to participate in the Bengal Global Business Summit in January next.
Inviting investors to invest in West Bengal, she said the state was strategically poised and safe and sound politically and geographically.