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What is unclear is valid, and there is not necessarily evidence.
The best proof of one thing is whether it is effective or not, and the best test of theory is whether it has evidence.

Famous saying:? What is unclear is valid, and there is not necessarily evidence.

Meaning:? Nothing is clearer than effective inspection, and nothing is more certain than evidence.

Source:? On Humber Burial by Wang Hanchong.

People who made great achievements in ancient times not only had talent, but also had unremitting determination. "Doing something" must be firm in faith and adhere to ideals. Xia left a farewell letter to his wife before he died peacefully, "Insist on the revolution to follow my ambition and swear to spread the truth to the world"; Mao Xianglin, a model of the times, vowed to turn to the cliff for help.

"The mountain is one foot wide and the road is one foot long. Even if our generation is poor and bitter for ten years, we must let the next generation live a good life! " From the last words of martyrs in the revolutionary war years to thank you sir in the peacetime, China people's persistence in ideals and beliefs spans time and space and lasts forever!