The Long March 7 (Chinese: 长征七号运载火箭), or Chang Zheng 7 in pinyin, abbreviated LM-7 for export or CZ-7 within China, originally Long March 2F/H or Chang Zheng 2F/H, nicknamed Bingjian (冰箭; 'the Ice Arrow'), is a Chinese liquid-fuelled launch vehicle of the Long March family, developed by the China Aerospace Science and Technology Corporation (CAST).

The Long March 7 project started in 2008 with the formation of the development team within the traditional designer of space launch vehicles, CALT.

[5] With the acquisition of the RD-120 technology and development of the YF-100 and YF-115 engines, the original plan was to re-engine the Long March 2F.

The Long March 2F/H, as it would have been called, would "just" switch from N2O4 / UDMH to a LOX / kerosene propellant and improved thrust engines to offer better performance.

[6] At the same time, the original Long March 5 project was expected to include heavy, medium and light versions.

[6] Although finished nearly at the same time, the Long March 6 was a completely separate product developed by a young team within SAST.

It launched in the LM-7 configuration with the addition of the simultaneously debuting Yuanzheng-1A upper stage; the flight performed its multi-orbit mission successfully.

[10] It is capable of placing a 5,500 kg (12,100 lb) payload into a Sun-synchronous orbit (SSO) of 700 km (430 mi).

It also shares tank diameters and engines with the Long March 6, but the design groups were completely different.

[7] The basic Long March 7 can be optimized by varying the number of boosters or enhanced by the addition of upper stages.

[14] A Long March 7 rocket booster created a fireball visible from portions of Utah, Nevada, Colorado, Idaho and California on the evening of 27 July 2016; its disintegration was widely reported on social media, and the uncontrolled re-entry of such a five-ton object was regarded as a rare event.

[11] While it shares diameter and engines with the Long March 6 first stage, the development was completely separated and done by different groups.

[11] While it shares engines with the Long March 6 second stage, the development were completely separated and done by different groups.

[7] It can use the Yuanzheng-1A upper stage to increase payload to higher energy orbits and enable multiple ignition missions.

[16] The inaugural flight successfully used this upper stage to deliver multiple payloads to different orbits.

They had to work with the local industry to develop space rated dual processor PLCs.

[17] In a paper published on the Manned Spaceflight publication of the CMSEO, the Long March 7 was presented as a family of launch vehicles.

There was also proposed an alternative second stage powered by the LH/LOX propellant and dual YF-75 engines would be identified by appending an (HO) to the designation.

[18] In 2021, some observers speculated, based on unconfirmed Chinese Baidu posts, that the failure of the CZ-7A's maiden flight was caused by the loss of pressurization in one of its four boosters just prior to main engine cutoff and the staging of the first stage (about 168 seconds into the flight).