Another Suspected-Chinese device found in Indonesia

The tales of "missile like" objects washing up in Indonesia continue. Just a couple of weeks after the forth Chinese-made Sea Wing underwater glider turned up in Indonesian territorial waters, another China-linked device has turned up on a beach in the country. This object isn't a Sea Wing however.
Chinese underwater sensor found in Indonesia
The cylindrical object was shared online by @Jatosint (Twitter). It is unclear what it is. However it has a small four-bladed screw on one end. This is not in a streamlined position, and is arranged as a 'puller', so it does not appear to be for propulsion in the conventional sense. The cap on the other end of the cylinder is missing, but it appears that sensors and/or aerials were attached.
Chinese underwater sensor found in Indonesia
It is reportedly 1.5m (5 ft) long and weighs around 25kg (55 lb)

Get The essential guide to World Submarines
This Covert Shores Recognition Guide Covers over 80 classes of submarines including all types currently in service with World Navies.
Check it out on Amazon

The best guess is that this is some form of floating sensor device, conceptually similar to the Argo Float. It is not an Argo type however, despite those being used in the region (and by China). For context Argo is an international program using 'profiling floats' to observe temperature, salinity, currents, and bio-optical properties in the Earth's oceans. China does participate, but Argo floats look a bit different and are typically painted Yellow or, in China, Red.

Argo floats do not have the propeller. Possibly this helps it move up and down the water column. The blue paint is also unusual.

Links to articles and photos (Indonesian)

The device has a metal plate on it with labels in Chinese. There are no ownership markings however. At first glance the labels may relate to communications monitoring, but acoustic sensors may be more plausible.

Chinese underwater sensor found on Indonesian beach

It was found on January 19 on a beach in the East Siantan District of the Anambas Islands Regency, Riau Islands. The object's paint has been rubbed off in patches, but there is not very much fouling. This suggests that it hasn't been in the water that long. This is close to the path of several Chinese ships, not least the Xiang Yang Hong 03 which has been accused of 'running dark' in Indonesian waters.

Related articles (Full index of popular Covert Shores articles)
Flag Chinese Sea Wing UUV (Glider)
Flag Theseaus AUV
Flag Iranian XLUUV
Flag NMRS UUV captured by North Korea
Flag XLUUV armed extra-large UUV
Flag Chinese HSU-001 LDUUV
Flag Garmoniya-GUIDE AUV
Flag Sub ASWUUV anti-submarine unmanned underwater vehicle
Biomimetic Underwater Vehicles
Flag Poseidon Intercontinental Nuclear-Powered Nuclear-Armed Autonomous Torpedo, and countering it
Flag Russian Navy Beluga whale
Flag Harpsichord (Klavesin) AUV
Flag SwarmDiver micro-USV
Flag Nerpa anti-diver UUV
Flag Cephalopod armed extra-large UUV

The World's ONLY Guide to
Narco Submarines
10 years of research, analyzing over 160 incidents, condensed into a handy guide. This unique book systematically breaks down the types and families. With detailed taxonomy, recognition 3-views, profiles and photos. Available on Amazon