THE SUCCESSION TO WEI-MING YUAN-HAO 189
Perhaps the Tanguts' audacious pursuit of diplomatic parity with Liao vis-a-
vis the Sung court also lay behind the Khitans' punitive campaign. Warned
by the Liao court not to conclude peace with Hsia just yet, the Chinese warily
withheld the Sung patent of investiture for Wei-ming Yiian-hao. But after
learning of
a
Khitan defeat the Sung seized the initiative and dispatched its
envoys to conclude the treaty with Hsia in winter of 1044.
Besides the points already mentioned, the treaty with Sung stipulated that
Hsia would receive Sung envoys at Yu-chou, not at the Tangut capital, using
the same protocol
(pin
k'o li) as it extended to Liao envoys. Border markets
were restored. The annual gifts totaled 255,000 units: 153,000 p'i of silk,
30,000 small chin of tea, and 72,000
Hang
of silver.
67
Clarification of the
boundary between the two states, however, remained subject to discussion.
This failure to clearly demarcate the border was to remain a source of bitter
disputes until the two sides ceased to share a border, after Sung lost its
northern territories to Chin.
Meanwhile, the war with the Khitan continued. Having ably frustrated a
three-pronged Liao invasion of his territory, the Tangut ruler hastened to
mollify the humiliated Liao emperor.
68
Relations were temporarily patched
up,
but the conflict broke out again several years later, and it is not even
certain that the Liao court ever formally invested Wei-ming Yuan-hao's
successor, Liang-tso.
THE SUCCESSION TO WEI-MING YUAN-HAO
The various accounts of Wei-ming Yuan-hao's death and the origins of his
successor are extremely confused.
69
Toward the end of the Sung war the
Tangut emperor took as his own wife the intended bride of
his
son, a lady of
the Mo-i clan. His doing so is usually castigated as incestuous, but perhaps it
was an attempt to loosen the tentacles of the Yeh-li, the empress's extremely
powerful clan. The Mo-i concubine bore a son. Yuan-hao's officially desig-
nated heir was Ning-ling-ko, a son of the Yeh-li empress, and the Yeh-li
elders Wang-jung and Yii-ch'i, who dominated both the court and the
military, doubtless viewed these developments as a serious threat to their own
interests. It was thus arranged to marry Ning-ling-ko to the daughter of the
67 Huang Ch'ing-yiin, "Kuan yii Pei Sung yii Hsi Hsia ho yiieh chung yin chiian ch'a te shu Hang wen
t'i," Chung
hsiieh
li shih
chiao
hsiieh,
9 (1957), pp. 19—20.
68 On the Khitan invasion of Hsia, see SS, 485, pp. 13999—14000; LS, 19, pp.
230-1;
Shen Kua
(1031?—95), Meng-bsi [ch'iipi t'an
chiao
chmg,
ed. Hu Tao-ching (Peking, 1957; repr. Taipei, 1965),
pp.
787-9°-
69 This section draws on the following accounts: HCP, 162, pp. ia—2a; Ssu-ma Kuan, Su-shui
chi
wen,
9,
pp.
9a-b; 10, pp. jb, 9a; 11, pp. nb-i2a; Wang Ch'eng (d. ca. 1200), Tung tu shih
lu'eh,
repr. in
vols.
11—14 of
Sung
shih tzu liao ts'uipirn, 1st series, ed. Chao T'ieh-han (Taipei, 1967) 127, p. 6a-b;
Tai, Hsi Hsia chi, 11, pp.
lib—
12a;
Wu, Hsi Hsiasbusbib, 18, pp. I2b-I3a.
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