The objects, whatever they were, fell off within seconds of liftoff. The launch escape tower isn't jettisoned until a few minutes into the flight when it's possible to safely separate the vehicle without it. I suspect these objects were either some form of insulation or perhaps some padding to cushion the vehicle from reflected shock waves during the first few seconds of flight.

Just thinking about it, the launch escape tower seems more a legacy of the Soyuz inspired design than anything else. Our Gemini capsules were launched on hypoergolic propelled Titan II boosters and they used an ejection seat. From what I've read, hypergolic propellants aren't as prone to explosion as most other propellants.

The launch escape system may be a better solution instead of ejection seats, especially if they plan on eventually carrying up to 3 people. The capsule is pretty small, so putting in 3 ejection seats (and the necessary hatches) might not be possible. There's another consideration - China is working on a next generation of boosters that don't use hypergolic propellants. Their current design with the launch escape system could be suitiable for the new booster without modification.

The Chinese have a proven track record for long-term thinking. Back in the 1970s, Chairman Mao was asked his opinion of the French Revolution. His classic reply, "Too soon to tell."