one the biggest puzzle about the opium war, is why Manchus do not even to mobilize,the combine brit and indian mercenary is just 8000 men.!
I don't think it is fair to say that Qing did not mobilize. We have to remember that China was not a country but an empire. i.e. revolts and border wars are generally dealt with the local province raising troops. The concept of Westphalian sovereignty is forced upon China by the 8 nation alliance.
You have to remember that China had continuously been attacked by "barbarians" through out the ages; some times they sacked a few cities, other times they were beaten back. But the most important thing is, these invasions were rarely permanent and were treated as flesh wounds; not wounds to the soul of the country.
That idea and thought runs through the Han, Tang, Sung and right down to the Nationalist whom treated the Japanese invasion as a flesh wound to the country, while the CCP civil war is the mortal one.
one the biggest puzzle about the opium war, is why Manchus do not even to mobilize,the combine brit and indian mercenary is just 8000 men.!
The obvious answer is that the Qing Emperor felt that it was cheaper to sue for peace than to mobilize for a full out war with the British.
The question then is, why did he feel that way?
And let not forgot the Manchu is an ethnic minority in China and the last that they want is an disrupt to their rule in China, hence they'd rather surrender to the British demands than risk full scale war and the possibility of being toppled over. There were fraction in court officials that wanted full scale war versus those who wanted to sue for peace for the reason above. But as history tells you, easily giving into demands of others/invaders won't stop from there and asking for an repeating (aka second opium war).