Core Points - The successful implementation of the second tethered ignition test for the Long March 10 series rocket was conducted at the Wenchang Space Launch Site on September 12 [1] - The test involved simultaneous ignition of seven engines in the first stage of the rocket, lasting a total of 320 seconds, and focused on assessing the low operating conditions and secondary ignition capabilities of the engines [1] - Completion of both planned tethered ignition tests marks a significant milestone in the development of the Long March 10 series rocket [1] Summary by Category - **Test Details** - The ignition test was initiated at 15:00 with the command from the test control center [1] - Seven engines were ignited simultaneously, completing multiple test procedures [1] - The test duration was 320 seconds, providing comprehensive data for analysis [1] - **Significance** - The successful completion of the tethered ignition tests indicates a phase breakthrough in the development of the Long March 10 series rocket [1] - This achievement reflects the progress in China's manned space program and its capabilities in rocket technology [1]