Baodukou is a modest mountain by Shandong standards. At 584 metres it is the highest peak in the hills of southern Shandong, and it stands twenty-five kilometres south-west of Shanting District in the north of Zaozhuang. The mountains around it run above 500 metres, and the highest ground anywhere in the prefecture reaches 620. The hill is far older than its name. It was called Lou Shan in the Han, Xiantai Shan in the Wei and Jin, and only came to be called Baodukou in the Tang and Song; a national forest park stands on it now, one of the parks that carry the northern half of Zaozhuang's tourism, set against the old town of Taierzhuang in the south and Weishan Lake along the western edge.
From the journal
Baodukou: The Highest of the Southern Hills, and a Name in the Orders of 1938
A 584-metre hill in Shanting District, called Lou Shan under the Han, that a divisional order in the spring of 1938 told troops to hold.
In the same city · Zaozhuang ↗An Old Hill With a New Name
A Hill Named in a Divisional Order
Two dates give the hill a second life. In 1923 the Lincheng case of Sun Meiyao ended with the travellers carried off to Baodukou, and the name has stayed tied to that episode since. And in the spring of 1938 it became part of the Taierzhuang battleground by way of a map and a telegraph: when the 85th Army was ordered to seize the high ground around Baodukou and make a feint towards Zaozhuang and Yixian while the main effort went south, the order named the hill itself. That the ground was named at all is the point. In a battle decided street by street a few dozen kilometres away, a commander still had to say which hills his troops were to hold.