Kolkata, Jan 07 (ANI): West Bengal Chief Minister Mamata Banerjee on Wednesday invited industrialists from across the world to invest in the state and assured them all help in establishing their businesses. While addressing business heads from all around the world after inaugurating the two-day Bengal Global Business Summit along with Union Finance Minister Arun Jaitley promised a business-friendly environment in the state. She assured that political differences will not block the road for development.