The 137th Infantry Regiment then landed and proceeded inland to isolate Hong Kong, as part of the large-scale Canton Operation.

[2] The detached regiment was converted into the 21st Independent Mixed Brigade which was eventually sent to participate in the Invasion of Southern French Indochina.

Until the surrender of Japan on 15 August 1945, the 104th Division built coastal fortifications along the Daya Bay – Haifeng County – Lufeng – Huizhou line.

The 137th Infantry Regiment was garrisoned at Haifeng County, and was moved to Humen Town port on 19 February 1946.

The 104th Artillery Regiment was located on the southern outskirts of Huizhou, but was transferred on 18 February 1946 to Dongguan.