no. 2
On Sieve method and Goldbach problem
Séminaire Delange-Pisot-Poitou, Tome 20 (1978-1979) no. 2, Exposé no. 30, 4 p. 
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     author = {Wang, Yuan},
     title = {On {Sieve} method and {Goldbach} problem},
     journal = {S\'eminaire Delange-Pisot-Poitou},
     note = {talk:30},
     pages = {1--4},
     year = {1978-1979},
     publisher = {Secr\'etariat math\'ematique},
     volume = {20},
     number = {2},
     zbl = {0422.10044},
     language = {en},
     url = {https://www.numdam.org/item/SDPP_1978-1979__20_2_A7_0/}
}
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Wang, Yuan. On Sieve method and Goldbach problem. Séminaire Delange-Pisot-Poitou, Tome 20 (1978-1979) no. 2, Exposé no. 30, 4 p.. https://www.numdam.org/item/SDPP_1978-1979__20_2_A7_0/

[1] Pan Cheng-Dong, Ding Xia-Xi and Wang Yuan. - On the representation of every large even integer as a sum of a prime and an almost prime, Scientia Sinica, t. 5, 1975, p. 599-610. | Zbl | MR