Why aren't there any events for Qing Empire to annex the Outer Manchuria area (Transamur, some chunks of territory north of the Amur river, and possibly Sakhalin) with cores? They were historical Manchurian Chinese territory, after all, and if Kaiserreich's China is revanchist enough to want to go after Outer Mongolia (declared independence in the 1910s), Hong Kong (lost to the British in the 1840s) and Macau (settled by the Portuguese in the 1500s), they'd want to get the Amur watershed (occupied by Russia in the 1850s and 1860s) back off Russia and Transamur too, no?