1728 (the sixth year of Yongzheng), Cai Wen succeeded Ma Xiantu (the famous lord protector side) as the third official of Ryukyu Palace. This is the second Ryukyu official born in Kumi Village (China) after Jiong Zheng.
1732, Cai Wen formulated the official rank determination based on Cheng Shunze's Official System of Zhongshan Palace, and made detailed provisions on the promotion of Ryukyu official rank. Cai Wen divided the gentry below the royal family (including kings, princes and ministers) and above the common people into nine-rank officials and eighteen-rank officials, the so-called "nine-rank eighteen-rank". This system continued until the demise of Ryukyu. 1732 (the tenth year of Yongzheng) in June, 1 1, Cai Wen promulgated the "Guide to People's Words and Actions, Imperial Regulations". This book refers to the reading notes with the writer Yi (Toyokawa is the founder), covering family ethics, social morality, the relationship between monarch and minister, the relationship between landlords and farmers, as well as filial piety, women's morality, early childhood education, getting along with mother-in-law, respecting the old and caring for the young, diligence and thrift, outlook on life, outlook on money, getting rid of superstitions, and educating the people by national laws. Since then, imperialism has been used as a textbook for Ryukyu until 1879.
However, the imperialism promulgated by Cai Wen was opposed by some people. 1733, because of dissatisfaction with Cai Wen's reform policy, some writers, such as Hirazuka Asami, senior officials and friends of Wang Fu, wrote to the residence of Samak in Ryukyu pursued by Black Saemon in western Sichuan to criticize this policy. Due to the friendly relationship between Samoan and Ryukyu Palace at that time, these letters finally fell into the hands of King Shang Jing. After learning about this incident, he called Jing Wang, and killed the first offenders Ping Chaomin and An in Hong Kong on the grounds of rebellion. All 15 comrades were beheaded, which is known as the "Ping Youzhi incident". Through this incident, Cai Wen completely eradicated the opposition forces of the pro-Japanese faction, paving the way for later reforms. Because of its straightness and good water quality, Daidi Dachuan in the northern part of Ryukyu Island often has countercurrent phenomenon when it rains heavily, which has repeatedly burst its banks and destroyed local farmland. 1735 (13th year of Yongzheng) In July, Dachuan, Yu Di burst its banks again, destroying countless farmland. Cai Wen was ordered to cut the river between feathers. He "went out in the evening, settled the river according to law, cultivated the fields, and the people were safe." The local people are very grateful, so they set up the "Gaijue Jade Emperor Monument" to commemorate his deeds.
Ryukyu was originally densely forested. Because Ryukyu people don't understand the management methods of forests and fields and over-exploit environmental resources, many forest vegetation and fields have been seriously damaged. Most of Ryukyu's financial revenue comes from tribute trade with China. If there is a shortage of wood, it is impossible to build tribute boats. At this time, it was necessary to borrow wood from Samoans, which not only increased Ryukyu's dependence on Samoans, but also increased Wang Fu's fiscal deficit. 1736, Cai Wen was ordered to lead a bureaucrat to inspect the forests in Ryukyu, and visited various places to teach people how to manage the forests, which lasted for five months. Cai Wen has successively enacted the Law of Mountains, the Balance of Mountains, the Law of Mountains and other laws to guide people on how to manage mountain forests, which has become the professional standard and punishment regulations for mountain forest management. The regulations reward the planting of vegetation, restrict the behavior of shipbuilding and firewood cutting for reward, and prohibit the construction of large ships in China. Since then, Cai Wen and two other legal departments have successively approved and promulgated four forest management methods, namely, the tree planting method, the general rules of mountains, the scale account of mountains and the official account of mountains. These seven laws, together with the imperial finger control in the era of Shang and Taiwan kings, were collectively called Lin Zheng's eight books by Okinawa scholars.
/kloc-in 0/750, the minister of Ryukyu Palace proposed to move the capital to Nagao and build a canal between Nagao Bay and the inland sea of Yu Di. However, Cai Wen inspected the local geomantic omen and thought it was not suitable to build a capital here, so he rejected this suggestion. Cai Wen cut up the "Long Mai Monument in Miyake" among the famous guards, warning future generations not to move the capital to the famous guards, and not to dig ditches in the famous guards, otherwise it would destroy the geomantic omen. At that time, Ryukyu society respected gentry and despised farmers. The business tax reached four or five taels, which was considered too harsh by businessmen, so the business of Ryukyu was depressed. After Cai Wen came to power, he encouraged farmers and lower-class gentry to engage in cottage industries and implemented a tax-free policy for them. In order to raise funds, Cai Wen introduced the bidding system from China, which became the only financing channel for poor craftsmen. Cai Wen's policy promoted the sales and development of Ryukyu lacquerware, sculpture and pottery, and made Ryukyu's business prosper gradually. The most remarkable change is that the tribute ships from Ryukyu to China no longer need to ask the Emperor China for new ones because the ships are too shabby.
There has been a famine in Ryukyu. In the early days, only kings and nobles could eat rice, and civilians ate the fruit of the phoenix-tailed banana (cycad). 1605, Ryukyu introduced sweet potatoes from Fujian, and they were also the staple food. At that time, Ryukyu's wine, noodles and tofu were specially made in Wang Fu, and people were forbidden to make them privately. Therefore, the output of rice, wheat and soybean in Ryukyu is very low. After Cai Wen came to power, he abolished the autocratic system in Wang Fu and let the people make their own decisions. The output of agricultural products has greatly increased, and Wang Fu's financial situation is improving.
Although Ryukyu has a law to divide land equally, the legislation has not led to frequent changes in land boundaries and serious land annexation. In order to narrow the gap between the rich and the poor, Cai Wen suggested that businessmen measure the cultivated land in Ryukyu. 1737 (the second year of Qianlong), King Shang Jing ordered Cai Wenjiao to amend the law. At the same time, King Shang Jing ordered three officials to start surveying the land of the whole country 14 years from Ruji (knowing the name of Rong Chao, the pro-party) and demarcate the land boundary, which greatly increased the land production area of Ryukyu. This is the "dry dragon patrol" in the history of Ryukyu. Because Ryukyu is far from the Qing Dynasty, close to the Japanese state of Satsuma, and it is a vassal state of Satsuma, Cai Wen thinks that Ryukyu is difficult to cater to the Qing Dynasty, but it is very necessary to cater to Satsuma. During Cai Wen's administration, Ryukyu tried its best to maintain close relations with Samoa. On the other hand, however, Cai Wen's pro-Japanese policy is very tough. For example, in 1734, Cai Wen used the incident of sending letters to friends in Pingzhai to completely eliminate the pro-Japanese faction in the imperial court. The following year, Mao Bingren, the eldest brother of the pro-Japanese faction who sent a friend to Ancheng, was also relieved from the post of three officials and was replaced by Ji Xiang.