Any thoughts on what seems to me to be a early jettison of the Launch Escape System?
Part of the problem is that China has not released a CZ-2F "User's Guide", but did previously (in 1999) release one for CZ-2E, upon which CZ-2F is based. The CZ-2E manual showed staggered cutoff times for the boosters and first stage (139 seconds for the boosters, 158 seconds for the first stage). The CZ-2F setup likely changed to reduce dynamic loads, g-forces, etc. during ascent for the Shenzhou spacecraft and their abort systems. The CZ-2F boosters apparently were stretched slightly to carry more propellant than the CZ-2E boosters, allowing for their longer burn times. - Ed Kyle