"The two sides have also agreed on building railways in Nepal," Gopal Khanal, foreign affairs adviser to Nepal Prime Minister K P Sharma Oli, told Japanese agency Kyodo News.
Oli, who arrived here on a week-long visit has signed 10 agreements during his meeting Chinese Premier Li Keqiang. This included a landmark transit treaty to end the near-total dependence on India for essential supplies.
By 2020, China plans to extend the high-elevation Qinghai-Tibet Railway to Gyirong, which borders Nepal.
Yesterday, Oli proposed two rail kinds of railway projects to China when he met Premier Li, said Hou Yanqi, Deputy Director General in Foreign Ministry's Asia Department.
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"The first is projects of Nepal connecting cities in Nepal, and the second is a cross border railway," she said.
Hou said Oli "raised the issue of building a cross-border railway between China and Nepal" for which he has got a "positive response from the Chinese side and the two sides have agreed to conduct feasibility study at an early date."
Referring to the transit treaty which the Nepalese government hopes will end its dependence on India, Khanal said "the Transport Transit Agreement is a milestone for Nepal."
"Although many details will have to be worked out, the treaty will tremendously boost the confidence of Nepalese people," Khanal said.
So far, Nepal has conducted trade with third countries through the Indian port of Kolkata.
Khanal said the preliminary understanding was that China would allow Nepal to use Guangzhou port in southern Guangdong province.
Oli will also be seeking Chinese assistance to build fuel reservoirs at three locations in Nepal to avoid the crisis experienced during the border blockade by Madhesis, the Indian origin people who were agitating against the new Constitution.
The Nepal government blames the blockade on India.
Khanal said the Free-Trade Agreement, which the two sides agreed for a feasibility study, would allow Chinese banks to open branches in Nepal to facilitate trade.
Oli also hopes to improve road connectivity with China's help, especially by repairing the Tatopani route - the biggest trading route between the two nations - that went into disuse after heavy damage caused by last year's devastating tremors.
Oli will seek Chinese cooperation in widening the second biggest trading route - the Kyirong-Rasuwagadi route, he said.
It is not clear whether this was included in the 10 agreements two sides signed yesterday.
Khanal said that Oli will also seek Chinese investment to build the 443 MW Upper Arun hydroelectric project, also located in Sankhuwasabha.
The agreements concluded yesterday included a treaty on economic and technical cooperation to build a Regional International Airport Project at Pokhara, Nepal's famous tourist site for which China will extend USD 216 million soft loan.