Batei Airdrome was referred to as Okaseki on American aerial reconnaissance photos taken during WWII, although I could not locate any place called Okaseki in the neighborhood. Like Kokko and Koryu Airdromes, Batei also had a long and straight strip in addition to the main runway. I think the strip was used as an auxiliary runway because fewer taxiways were connected to it than to the main runway.
On Batei’s auxiliary runway, I found several building as shown in the next photo, which in effect shortened its usable length.
Batei had the V-shaped aircraft revetments, which were commonly found on other WWII airdromes on Taiwan. I also found another smaller revetment (on the left side of the next photo), whose exact function could not be confirmed.
In the following 1969 CORONA satellite image, Batei Airdrome was visible, although the taxiway on the east side had vanished.
Bade Air Base (later renamed Huaishen Air Base) was built on the location of the former Batei Airdrome. From the following Google Earth image, it is clear that the runway of Bade Air Base was not an expansion of the old main runway. Although the Japanese main runway has long gone, the auxiliary runway has left marks on the landscape. The long and narrow area sitting between Lanes 774 and 781, XingFeng Road and Lane 825, XingFeng Road and YongZhong Street tells us where the auxiliary runway used to be.