China - Nepal Railway

Nepal and Tibet in China are neighbors bordering each other, both famous for the beautiful natural sceneries and profound Buddhism culture. However, blocked by the high Himalayas Mountains, the two can only "hear" from each other, rather than "paying" a visit frequently. Thus, China - Nepal Railway Line emerges as the time requires. It will make the trip from Nepal to China by train and vice versa possible for both Buddhists and tourists.

It will start from Shigatse Railway Station in Shigatse of Tibet to Katmandu, Nepal's capital city. The designed top speed will only be 75mi/h (120km/h) at most, because of the remarkable elevation changes and challenging Himalayan terrain. Going through Tibetan Plateau, it will be the world's highest rail road, another miracle after Tibet railway which is the first railroad built on that plateau.  
 Nepal - China Railway Project will go via Kerung Pass, rather than the rumored Zhangmu Pass to avoid the Mount Everest. It is planned to be built in two phases.

 Shigatse - Kerung Railway: It is an extension of Lhasa-Shigatse Railway, measuring about 336 miles (540 km). It has been put into construction, and is expected to be completed by 2025.

 Kerung - Katmandu Railway: Because this rail line will be more likely to go through Himalayas, a long tunnel needs to be dug. This will be an arduous work and many difficulties remain to be overcome. 
 Firstly, it will contribute a lot to the tourism industry of both countries, especially Nepal. China is the second largest group of inbound tourists to Nepal. However, the expensive flight tickets and time-consuming and dangerous international coaches stop the feet of many travelers. Once the railroad is put into operation, a quick transfer by Tibet to Katmandu train will be possible and it will be much safer and cheaper. This will also greatly promote the Buddhism exchanges between the two countries.

Also, there is no doubt that the international trade between the two countries will be greatly increased. Currently, only two roads and a few flight are connecting the two countries, which cannot meet the transportation demands at all.

Lastly, except the Indian transportation line, Nepal will have another line to get what they need such as oil from China through Lhasa - Katmandu Railway.
  Traveling by flight:
Now, you can make a quick transfer between the two countries by flight. Direct flights are catchable between Katmandu and Lhasa and Chengdu; the duration is 1.5 and 3 hours respectively and ticket fare for economy class is about CNY 2200 - 3,000 and CNY 2,900 respectively.

 Traveling by coach:
The coaches are running between Lhasa and Katmandu via Zhangmu Pass and also Kerung Pass.

Via Zhangmu Port: After taking the train to Shigatse, then take a city bus to Shigatse Coach Station to take a 8-hour coach to Nyalam, then head to Petro China Petro Station Station to take a bus operated by the local government to Zhangmu Port to exit. 

Via Kerung Port: From Shigatse Coach Station, take a coach to Kerung Town, then take a taxi to Kerung Port to exit China.

 Note
All international travelers who visit Tibet are required to apply for a Tibet Travel Permit ahead of the trip, and usually they can only obtain the permit through a travel agency. In this case, you can only go from Lhasa to Katmandu with the assistance of a travel agency.

Other International Trains between China and nearby Countries

K23/K24: Beijing - Ulaanbaatar	K27/K28: Beijing - Pyongyang	T8701/T8702: Nanning - Hanoi
4652/4653: Hohhot - Ulaanbaatar	Z5/Z6: Beijing - Hanoi	K7023/K7024: Harbin - Vladivostok
K9795/K9796: Urumqi - Almaty K9797/K9798: Urumqi - Astana	K19/K20 Beijing - Manzhouli - Moscow	K3/K4 Beijing - Ulaanbaatar - Moscow
Erlian - Ulaanbaatar	D887/D888: Kunming - Vientiane

 International railways under construction/planning from China to: