China–India relations major economies in the world. Growth in diplomatic and economic influence has increased the significance of their bilateral relationship. Cultural and economic relations between China and India date back to ancient times. The Silk Road not only served as a major trade route between India and China, but is also credited for facilitating the spread of Buddhism from India to East Asia. During the 19th century, China's growing opium trade with the East India Company triggered the First and Second Opium Wars. During World War II, India and China both played a crucial role in halting the progress of Imperial
Illegal immigration to India a danger to India's internal security". Apart from immigrants a large numbers smugglers regularly cross the porous border along West Bengal into India. They mainly engage in smuggling goods and livestock from India into Bangladesh to avoid high tariff imposed on some Indian goods by Bangladesh government. Bangladeshi women and girls are also trafficked to India . The Centre for Women and Children Studies estimated in 1998 that 27,000 Bangladeshis have been forced into prostitution in India. According to CEDAW report, 1% of foreign prostitutes in India and 2.7% of prostitutes in Kolkata are from Bangladesh. Illegal immigration to India