Chinese President Xi Jinping with Nepal PM KP Sharma Oli. (AFP)

Chinese President Xi Jinping has said that China will provide Nepalese Rs 56 billion or $492 million assistance to Kathmandu over the next two years to help Nepal's development programmes as the two countries inked 20 agreements on Sunday to bolster their bilateral ties.

Xi, who arrived in Kathmandu on Saturday after a two-day informal summit with Prime Minister Narendra Modi, held talks with his Nepalese counterpart Bidya Devi Bhandari on Saturday on the first day of his two-day state visit - the first by a Chinese leader in 23 years.

On Sunday, the Chinese president met Prime Minister KP Sharma Oli and held delegation-level talks. After the talks, the two sides signed 18 MoUs and two letters of exchange in different sectors such as transport, agriculture, industry, commerce and supply.

"The meeting between President Xi and Prime Minister Oli focused on all aspects of Nepal-China relations," local media quoted officials as saying.

During his meeting with Bhandari, President Xi announced a support of 3.5 billion RMB equivalent to Nepalese Rupee 56 billion to Nepal over the next two years to help the development programmes, officials said.

Xi also pledged to upgrade the Arniko Highway linking Kathmandu with Tatopani transit point - which was shut down following the devastating earthquake of 2015 - and open more customs points facilitating connectivity.

He said a feasibility study of trans-Himalayan railway will soon start and China will also support construction of the Kerung-Kathmandu tunnel road.

"We have model friendship in the world, and there is no issue between the two countries," Xi said during a state banquet hosted by President Bhandari on Saturday in his honour.